87619015644 has 12 divisors (see below), whose sum is σ = 204444369864. Its totient is φ = 29206338544.

The previous prime is 87619015513. The next prime is 87619015657. The reversal of 87619015644 is 44651091678.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3650792307 + ... + 3650792330.

It is an arithmetic number, because the mean of its divisors is an integer number (17037030822).

Almost surely, 2^87619015644 is an apocalyptic number.

It is an amenable number.

87619015644 is an abundant number, since it is smaller than the sum of its proper divisors (116825354220).

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

87619015644 is a wasteful number, since it uses less digits than its factorization.

87619015644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7301584644 (or 7301584642 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 87619015644 in words is "eighty-seven billion, six hundred nineteen million, fifteen thousand, six hundred forty-four".