51440432145 has 16 divisors (see below), whose sum is σ = 85142784960. Its totient is φ = 26488865984.

The previous prime is 51440432053. The next prime is 51440432161. The reversal of 51440432145 is 54123404415.

It is a happy number.

51440432145 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 51440432145 - 2¹⁶ = 51440366609 is a prime.

It is a super-2 number, since 2×51440432145² (a number of 22 digits) contains 22 as substring.

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, 59126499 + ... + 59127368.

It is an arithmetic number, because the mean of its divisors is an integer number (5321424060).

Almost surely, 2^51440432145 is an apocalyptic number.

It is an amenable number.

51440432145 is a deficient number, since it is larger than the sum of its proper divisors (33702352815).

51440432145 is a wasteful number, since it uses less digits than its factorization.

51440432145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118253904.

The product of its (nonzero) digits is 38400, while the sum is 33.

The spelling of 51440432145 in words is "fifty-one billion, four hundred forty million, four hundred thirty-two thousand, one hundred forty-five".