51050156990450 has 54 divisors (see below), whose sum is σ = 98343271141479. Its totient is φ = 19715356849440.

The previous prime is 51050156990429. The next prime is 51050156990489. The reversal of 51050156990450 is 5409965105015.

It can be written as a sum of positive squares in 5 ways, for example, as 19581164853721 + 31468992136729 = 4425061^2 + 5609723^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5052235.

It is a super-2 number, since 2×51050156990450² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (50).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 1465130729 + ... + 1465165571.

Almost surely, 2^{51050156990450} is an apocalyptic number.

51050156990450 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

51050156990450 is a deficient number, since it is larger than the sum of its proper divisors (47293114151029).

51050156990450 is an frugal number, since it uses more digits than its factorization.

51050156990450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69756 (or 34879 counting only the distinct ones).

The product of its (nonzero) digits is 1215000, while the sum is 50.

51050156990450 divided by its sum of digits (50) gives a square (1021003139809 = 1010447²).

The spelling of 51050156990450 in words is "fifty-one trillion, fifty billion, one hundred fifty-six million, nine hundred ninety thousand, four hundred fifty".