76720213531 has 8 divisors (see below), whose sum is σ = 82709958464. Its totient is φ = 70743067200.

The previous prime is 76720213513. The next prime is 76720213541. The reversal of 76720213531 is 13531202767.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 76720213531 - 2⁵ = 76720213499 is a prime.

It is a super-2 number, since 2×76720213531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76720213501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3136995 + ... + 3161356.

It is an arithmetic number, because the mean of its divisors is an integer number (10338744808).

Almost surely, 2^76720213531 is an apocalyptic number.

76720213531 is a deficient number, since it is larger than the sum of its proper divisors (5989744933).

76720213531 is a wasteful number, since it uses less digits than its factorization.

76720213531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6299301.

The product of its (nonzero) digits is 52920, while the sum is 37.

The spelling of 76720213531 in words is "seventy-six billion, seven hundred twenty million, two hundred thirteen thousand, five hundred thirty-one".