51455524640040 has 144 divisors (see below), whose sum is σ = 174817470702420. Its totient is φ = 13124887395840.

The previous prime is 51455524640033. The next prime is 51455524640041. The reversal of 51455524640040 is 4004642555415.

51455524640040 is a `hidden beast` number, since 5 + 1 + 45 + 5 + 524 + 6 + 40 + 0 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 43846301695716 + 7609222944324 = 6621654^2 + 2758482^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (51455524640041) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 134905981 + ... + 135286860.

Almost surely, 2^{51455524640040} is an apocalyptic number.

It is an amenable number.

51455524640040 is an abundant number, since it is smaller than the sum of its proper divisors (123361946062380).

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

51455524640040 is a wasteful number, since it uses less digits than its factorization.

51455524640040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270192904 (or 270192874 counting only the distinct ones).

The product of its (nonzero) digits is 1920000, while the sum is 45.

The spelling of 51455524640040 in words is "fifty-one trillion, four hundred fifty-five billion, five hundred twenty-four million, six hundred forty thousand, forty".