625396557 has 16 divisors (see below), whose sum is σ = 840411648. Its totient is φ = 413666880.

The previous prime is 625396553. The next prime is 625396591. The reversal of 625396557 is 755693526.

625396557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 625396557 - 2² = 625396553 is a prime.

It is a super-2 number, since 2×625396557² = 782241707014908498, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625396553) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 342148 + ... + 343970.

It is an arithmetic number, because the mean of its divisors is an integer number (52525728).

Almost surely, 2^625396557 is an apocalyptic number.

It is an amenable number.

625396557 is a deficient number, since it is larger than the sum of its proper divisors (215015091).

625396557 is a wasteful number, since it uses less digits than its factorization.

625396557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2660.

The product of its digits is 1701000, while the sum is 48.

The square root of 625396557 is about 25007.9298823393. The cubic root of 625396557 is about 855.1687625557.

It can be divided in two parts, 62539 and 6557, that added together give a palindrome (69096).

The spelling of 625396557 in words is "six hundred twenty-five million, three hundred ninety-six thousand, five hundred fifty-seven".