851860934425 has 24 divisors (see below), whose sum is σ = 1069531708536. Its totient is φ = 673008599040.

The previous prime is 851860934417. The next prime is 851860934429. The reversal of 851860934425 is 524439068158.

It can be written as a sum of positive squares in 12 ways, for example, as 599837858064 + 252023076361 = 774492^2 + 502019^2 .

It is not a de Polignac number, because 851860934425 - 2³ = 851860934417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (851860934429) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16677 + ... + 1305373.

It is an arithmetic number, because the mean of its divisors is an integer number (44563821189).

Almost surely, 2^851860934425 is an apocalyptic number.

It is an amenable number.

851860934425 is a deficient number, since it is larger than the sum of its proper divisors (217670774111).

851860934425 is a wasteful number, since it uses less digits than its factorization.

851860934425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1289037 (or 1289032 counting only the distinct ones).

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 851860934425 in words is "eight hundred fifty-one billion, eight hundred sixty million, nine hundred thirty-four thousand, four hundred twenty-five".