865820354425 has 12 divisors (see below), whose sum is σ = 1156203181420. Its totient is φ = 639375030720.

The previous prime is 865820354417. The next prime is 865820354429. The reversal of 865820354425 is 524453028568.

It can be written as a sum of positive squares in 6 ways, for example, as 92271960169 + 773548394256 = 303763^2 + 879516^2 .

It is not a de Polignac number, because 865820354425 - 2³ = 865820354417 is a prime.

It is a super-2 number, since 2×865820354425² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (52) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (865820354429) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1332030990 + ... + 1332031639.

Almost surely, 2^865820354425 is an apocalyptic number.

It is an amenable number.

865820354425 is a deficient number, since it is larger than the sum of its proper divisors (290382826995).

865820354425 is a wasteful number, since it uses less digits than its factorization.

865820354425 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2664062652 (or 2664062647 counting only the distinct ones).

The product of its (nonzero) digits is 9216000, while the sum is 52.

The spelling of 865820354425 in words is "eight hundred sixty-five billion, eight hundred twenty million, three hundred fifty-four thousand, four hundred twenty-five".