76131155520 has 672 divisors, whose sum is σ = 315259955712. Its totient is φ = 16486170624.

The previous prime is 76131155519. The next prime is 76131155531. The reversal of 76131155520 is 2555113167.

It is a happy number.

76131155520 is a `hidden beast` number, since 7 + 6 + 13 + 115 + 5 + 520 = 666.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 52395114 + ... + 52396566.

Almost surely, 2^76131155520 is an apocalyptic number.

76131155520 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 76131155520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157629977856).

76131155520 is an abundant number, since it is smaller than the sum of its proper divisors (239128800192).

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

76131155520 is a wasteful number, since it uses less digits than its factorization.

76131155520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619 (or 1606 counting only the distinct ones).

The product of its (nonzero) digits is 31500, while the sum is 36.

Adding to 76131155520 its reverse (2555113167), we get a palindrome (78686268687).

The spelling of 76131155520 in words is "seventy-six billion, one hundred thirty-one million, one hundred fifty-five thousand, five hundred twenty".