51082159440 has 80 divisors (see below), whose sum is σ = 170535835008. Its totient is φ = 12574069248.

The previous prime is 51082159439. The next prime is 51082159441. The reversal of 51082159440 is 4495128015.

It is an interprime number because it is at equal distance from previous prime (51082159439) and next prime (51082159441).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×51082159440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51082159441) 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, 8183124 + ... + 8189363.

Almost surely, 2^51082159440 is an apocalyptic number.

It is an amenable number.

51082159440 is an abundant number, since it is smaller than the sum of its proper divisors (119453675568).

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

51082159440 is a wasteful number, since it uses less digits than its factorization.

51082159440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16372516 (or 16372510 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The spelling of 51082159440 in words is "fifty-one billion, eighty-two million, one hundred fifty-nine thousand, four hundred forty".