86071978437 has 4 divisors (see below), whose sum is σ = 114762637920. Its totient is φ = 57381318956.

The previous prime is 86071978411. The next prime is 86071978457. The reversal of 86071978437 is 73487917068.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 86071978437 - 2⁶ = 86071978373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86071978457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14345329737 + ... + 14345329742.

It is an arithmetic number, because the mean of its divisors is an integer number (28690659480).

Almost surely, 2^86071978437 is an apocalyptic number.

It is an amenable number.

86071978437 is a deficient number, since it is larger than the sum of its proper divisors (28690659483).

86071978437 is a wasteful number, since it uses less digits than its factorization.

86071978437 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28690659482.

The product of its (nonzero) digits is 14224896, while the sum is 60.

The spelling of 86071978437 in words is "eighty-six billion, seventy-one million, nine hundred seventy-eight thousand, four hundred thirty-seven".