72587162021 has 12 divisors (see below), whose sum is σ = 79815091776. Its totient is φ = 65964176520.

The previous prime is 72587162017. The next prime is 72587162033. The reversal of 72587162021 is 12026178527.

It is not a de Polignac number, because 72587162021 - 2² = 72587162017 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72587162021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72587162621) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 226406 + ... + 443208.

It is an arithmetic number, because the mean of its divisors is an integer number (6651257648).

Almost surely, 2^72587162021 is an apocalyptic number.

It is an amenable number.

72587162021 is a deficient number, since it is larger than the sum of its proper divisors (7227929755).

72587162021 is a wasteful number, since it uses less digits than its factorization.

72587162021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219592 (or 219581 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The spelling of 72587162021 in words is "seventy-two billion, five hundred eighty-seven million, one hundred sixty-two thousand, twenty-one".