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51480061938 = 232534792
BaseRepresentation
bin101111111100011100…
…110110011111110010
311220212201211002220200
4233330130312133302
51320412343440223
635352152220030
73501503210064
oct577434663762
9156781732820
1051480061938
111a918175538
129b8869a616
134b155a0b16
1426c5123734
1515147a1a43
hexbfc7367f2

51480061938 has 18 divisors (see below), whose sum is σ = 111542219919. Its totient is φ = 17159699772.

The previous prime is 51480061933. The next prime is 51480061939. The reversal of 51480061938 is 83916008415.

It can be written as a sum of positive squares in only one way, i.e., 25740030969 + 25740030969 = 160437^2 + 160437^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is an ABA number since it can be written as A⋅BA, here for A=2, B=160437.

It is a junction number, because it is equal to n+sod(n) for n = 51480061893 and 51480061902.

It is not an unprimeable number, because it can be changed into a prime (51480061931) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 935883 + ... + 989361.

Almost surely, 251480061938 is an apocalyptic number.

51480061938 is an abundant number, since it is smaller than the sum of its proper divisors (60062157981).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51480061938 is an frugal number, since it uses more digits than its factorization.

51480061938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106966 (or 53484 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The spelling of 51480061938 in words is "fifty-one billion, four hundred eighty million, sixty-one thousand, nine hundred thirty-eight".

Divisors: 1 2 3 6 9 18 53479 106958 160437 320874 481311 962622 2860003441 5720006882 8580010323 17160020646 25740030969 51480061938