85137192772778 has 32 divisors (see below), whose sum is σ = 131967708364800. Its totient is φ = 41169293282880.

The previous prime is 85137192772769. The next prime is 85137192772787. The reversal of 85137192772778 is 87727729173158.

It is an interprime number because it is at equal distance from previous prime (85137192772769) and next prime (85137192772787).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6417578 + ... + 14541653.

It is an arithmetic number, because the mean of its divisors is an integer number (4123990886400).

Almost surely, 2^{85137192772778} is an apocalyptic number.

85137192772778 is a deficient number, since it is larger than the sum of its proper divisors (46830515592022).

85137192772778 is a wasteful number, since it uses less digits than its factorization.

85137192772778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20959742.

The product of its digits is 580849920, while the sum is 74.

The spelling of 85137192772778 in words is "eighty-five trillion, one hundred thirty-seven billion, one hundred ninety-two million, seven hundred seventy-two thousand, seven hundred seventy-eight".