87987938506 has 32 divisors (see below), whose sum is σ = 145514234880. Its totient is φ = 39648375936.

The previous prime is 87987938503. The next prime is 87987938509. The reversal of 87987938506 is 60583978978.

It is an interprime number because it is at equal distance from previous prime (87987938503) and next prime (87987938509).

It is not an unprimeable number, because it can be changed into a prime (87987938503) 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, 411775 + ... + 587821.

It is an arithmetic number, because the mean of its divisors is an integer number (4547319840).

Almost surely, 2^87987938506 is an apocalyptic number.

87987938506 is a deficient number, since it is larger than the sum of its proper divisors (57526296374).

87987938506 is a wasteful number, since it uses less digits than its factorization.

87987938506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176518.

The product of its (nonzero) digits is 182891520, while the sum is 70.

The spelling of 87987938506 in words is "eighty-seven billion, nine hundred eighty-seven million, nine hundred thirty-eight thousand, five hundred six".