611388625 has 16 divisors (see below), whose sum is σ = 763716096. Its totient is φ = 488660400.

The previous prime is 611388607. The next prime is 611388637. The reversal of 611388625 is 526883116.

It is not a de Polignac number, because 611388625 - 2¹¹ = 611386577 is a prime.

It is a Duffinian 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, 226534 + ... + 229216.

It is an arithmetic number, because the mean of its divisors is an integer number (47732256).

Almost surely, 2^611388625 is an apocalyptic number.

It is an amenable number.

611388625 is a deficient number, since it is larger than the sum of its proper divisors (152327471).

611388625 is a wasteful number, since it uses less digits than its factorization.

611388625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4521 (or 4511 counting only the distinct ones).

The product of its digits is 69120, while the sum is 40.

The square root of 611388625 is about 24726.2739813341. The cubic root of 611388625 is about 848.7356635419.

The spelling of 611388625 in words is "six hundred eleven million, three hundred eighty-eight thousand, six hundred twenty-five".