86861580111551 has 12 divisors (see below), whose sum is σ = 101056842222552. Its totient is φ = 74442629531088.

The previous prime is 86861580111539. The next prime is 86861580111563. The reversal of 86861580111551 is 15511108516868.

It is an interprime number because it is at equal distance from previous prime (86861580111539) and next prime (86861580111563).

It is a de Polignac number, because none of the positive numbers 2^k-86861580111551 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86861580111521) 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, 120511085 + ... + 121229718.

It is an arithmetic number, because the mean of its divisors is an integer number (8421403518546).

Almost surely, 2^{86861580111551} is an apocalyptic number.

86861580111551 is a deficient number, since it is larger than the sum of its proper divisors (14195262111001).

86861580111551 is a wasteful number, since it uses less digits than its factorization.

86861580111551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 241748150 (or 241748143 counting only the distinct ones).

The product of its (nonzero) digits is 2304000, while the sum is 56.

The spelling of 86861580111551 in words is "eighty-six trillion, eight hundred sixty-one billion, five hundred eighty million, one hundred eleven thousand, five hundred fifty-one".