51166610544 has 80 divisors (see below), whose sum is σ = 155936368640. Its totient is φ = 14147447040.

The previous prime is 51166610531. The next prime is 51166610567. The reversal of 51166610544 is 44501666115.

It is a happy number.

It is a super-2 number, since 2×51166610544² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 2445739 + ... + 2466570.

It is an arithmetic number, because the mean of its divisors is an integer number (1949204608).

Almost surely, 2^51166610544 is an apocalyptic number.

It is an amenable number.

51166610544 is an abundant number, since it is smaller than the sum of its proper divisors (104769758096).

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

51166610544 is a wasteful number, since it uses less digits than its factorization.

51166610544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4912358 (or 4912352 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The spelling of 51166610544 in words is "fifty-one billion, one hundred sixty-six million, six hundred ten thousand, five hundred forty-four".