86439797557 has 16 divisors (see below), whose sum is σ = 87516632448. Its totient is φ = 85371209280.

The previous prime is 86439797503. The next prime is 86439797579. The reversal of 86439797557 is 75579793468.

It is a cyclic number.

It is not a de Polignac number, because 86439797557 - 2¹¹ = 86439795509 is a prime.

It is a Duffinian number.

Its product of digits (400075200) is a multiple of the sum of its prime divisors (4860).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (86439717557) 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, 22374408 + ... + 22378270.

It is an arithmetic number, because the mean of its divisors is an integer number (5469789528).

Almost surely, 2^86439797557 is an apocalyptic number.

It is an amenable number.

86439797557 is a deficient number, since it is larger than the sum of its proper divisors (1076834891).

86439797557 is a wasteful number, since it uses less digits than its factorization.

86439797557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4860.

The product of its digits is 400075200, while the sum is 70.

The spelling of 86439797557 in words is "eighty-six billion, four hundred thirty-nine million, seven hundred ninety-seven thousand, five hundred fifty-seven".