76347531720 has 160 divisors (see below), whose sum is σ = 262871836920. Its totient is φ = 19862737920.

The previous prime is 76347531713. The next prime is 76347531721. The reversal of 76347531720 is 2713574367.

76347531720 is a `hidden beast` number, since 7 + 6 + 3 + 47 + 531 + 72 + 0 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 66356729604 + 9990802116 = 257598^2 + 99954^2 .

It is a super-3 number, since 3×76347531720³ (a number of 34 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (76347531721) by changing a digit.

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 39 ways as a sum of consecutive naturals, for example, 154527 + ... + 420206.

Almost surely, 2^76347531720 is an apocalyptic number.

It is an amenable number.

76347531720 is an abundant number, since it is smaller than the sum of its proper divisors (186524305200).

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

76347531720 is a wasteful number, since it uses less digits than its factorization.

76347531720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 574797 (or 574784 counting only the distinct ones).

The product of its (nonzero) digits is 740880, while the sum is 45.

The spelling of 76347531720 in words is "seventy-six billion, three hundred forty-seven million, five hundred thirty-one thousand, seven hundred twenty".