85191666951 has 32 divisors (see below), whose sum is σ = 117720168192. Its totient is φ = 54765849600.

The previous prime is 85191666919. The next prime is 85191666961. The reversal of 85191666951 is 15966619158.

It is not a de Polignac number, because 85191666951 - 2⁵ = 85191666919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85191666891 and 85191666900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85191666961) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4589976 + ... + 4608498.

It is an arithmetic number, because the mean of its divisors is an integer number (3678755256).

Almost surely, 2^85191666951 is an apocalyptic number.

85191666951 is a deficient number, since it is larger than the sum of its proper divisors (32528501241).

85191666951 is a wasteful number, since it uses less digits than its factorization.

85191666951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19023.

The product of its digits is 3499200, while the sum is 57.

The spelling of 85191666951 in words is "eighty-five billion, one hundred ninety-one million, six hundred sixty-six thousand, nine hundred fifty-one".