87640359491279 has 32 divisors (see below), whose sum is σ = 105738978240000. Its totient is φ = 70959423959424.

The previous prime is 87640359491231. The next prime is 87640359491303. The reversal of 87640359491279 is 97219495304678.

It is not a de Polignac number, because 87640359491279 - 2³⁶ = 87571640014543 is a prime.

It is a super-2 number, since 2×87640359491279² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87640359431279) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1951487477 + ... + 1951532385.

It is an arithmetic number, because the mean of its divisors is an integer number (3304343070000).

It is a 1-persistent number, because it is pandigital, but 2⋅87640359491279 = 175280718982558 is not.

Almost surely, 2^{87640359491279} is an apocalyptic number.

87640359491279 is a deficient number, since it is larger than the sum of its proper divisors (18098618748721).

87640359491279 is a wasteful number, since it uses less digits than its factorization.

87640359491279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87327.

The product of its (nonzero) digits is 823011840, while the sum is 74.

The spelling of 87640359491279 in words is "eighty-seven trillion, six hundred forty billion, three hundred fifty-nine million, four hundred ninety-one thousand, two hundred seventy-nine".