425616555 has 32 divisors (see below), whose sum is σ = 838139904. Its totient is φ = 179600256.

The previous prime is 425616523. The next prime is 425616593. The reversal of 425616555 is 555616524.

It is a happy number.

It is not a de Polignac number, because 425616555 - 2⁵ = 425616523 is a prime.

It is a super-2 number, since 2×425616555² = 362298903780136050, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

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, 154539 + ... + 157268.

It is an arithmetic number, because the mean of its divisors is an integer number (26191872).

Almost surely, 2^425616555 is an apocalyptic number.

425616555 is a deficient number, since it is larger than the sum of its proper divisors (412523349).

425616555 is a wasteful number, since it uses less digits than its factorization.

425616555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311835.

The product of its digits is 180000, while the sum is 39.

The square root of 425616555 is about 20630.4763638652. The cubic root of 425616555 is about 752.2106951447.

The spelling of 425616555 in words is "four hundred twenty-five million, six hundred sixteen thousand, five hundred fifty-five".