87344962581 has 16 divisors (see below), whose sum is σ = 119440440000. Its totient is φ = 56743063680.

The previous prime is 87344962571. The next prime is 87344962583. The reversal of 87344962581 is 18526944378.

It is a happy number.

It is not a de Polignac number, because 87344962581 - 2¹⁸ = 87344700437 is a prime.

It is a super-2 number, since 2×87344962581² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87344962583) 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, 311331 + ... + 521168.

It is an arithmetic number, because the mean of its divisors is an integer number (7465027500).

Almost surely, 2^87344962581 is an apocalyptic number.

It is an amenable number.

87344962581 is a deficient number, since it is larger than the sum of its proper divisors (32095477419).

87344962581 is a wasteful number, since it uses less digits than its factorization.

87344962581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 833396.

The product of its digits is 11612160, while the sum is 57.

The spelling of 87344962581 in words is "eighty-seven billion, three hundred forty-four million, nine hundred sixty-two thousand, five hundred eighty-one".