83512920785 has 32 divisors (see below), whose sum is σ = 117008105472. Its totient is φ = 56028772800.

The previous prime is 83512920773. The next prime is 83512920817. The reversal of 83512920785 is 58702921538.

It is a happy number.

It is not a de Polignac number, because 83512920785 - 2⁴ = 83512920769 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6328304 + ... + 6341486.

It is an arithmetic number, because the mean of its divisors is an integer number (3656503296).

Almost surely, 2^83512920785 is an apocalyptic number.

It is an amenable number.

83512920785 is a deficient number, since it is larger than the sum of its proper divisors (33495184687).

83512920785 is a wasteful number, since it uses less digits than its factorization.

83512920785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17093.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 83512920785 in words is "eighty-three billion, five hundred twelve million, nine hundred twenty thousand, seven hundred eighty-five".