51547671040 has 160 divisors (see below), whose sum is σ = 126447170256. Its totient is φ = 20148387840.

The previous prime is 51547671011. The next prime is 51547671053. The reversal of 51547671040 is 4017674515.

It can be written as a sum of positive squares in 8 ways, for example, as 1793691904 + 49753979136 = 42352^2 + 223056^2 .

It is a tau number, because it is divible by the number of its divisors (160).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 51547670984 and 51547671002.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21116220 + ... + 21118660.

Almost surely, 2^51547671040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51547671040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63223585128).

51547671040 is an abundant number, since it is smaller than the sum of its proper divisors (74899499216).

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

51547671040 is a wasteful number, since it uses less digits than its factorization.

51547671040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650 (or 2634 counting only the distinct ones).

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 51547671040 in words is "fifty-one billion, five hundred forty-seven million, six hundred seventy-one thousand, forty".