51545302440 has 64 divisors (see below), whose sum is σ = 155186314560. Its totient is φ = 13696488960.

The previous prime is 51545302427. The next prime is 51545302441. The reversal of 51545302440 is 4420354515.

It is not an unprimeable number, because it can be changed into a prime (51545302441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 730594 + ... + 798033.

It is an arithmetic number, because the mean of its divisors is an integer number (2424786165).

Almost surely, 2^51545302440 is an apocalyptic number.

It is an amenable number.

51545302440 is an abundant number, since it is smaller than the sum of its proper divisors (103641012120).

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

51545302440 is a wasteful number, since it uses less digits than its factorization.

51545302440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1528922 (or 1528918 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 33.

Adding to 51545302440 its reverse (4420354515), we get a palindrome (55965656955).

The spelling of 51545302440 in words is "fifty-one billion, five hundred forty-five million, three hundred two thousand, four hundred forty".