625533140661 has 16 divisors (see below), whose sum is σ = 979856109120. Its totient is φ = 349948609920.

The previous prime is 625533140653. The next prime is 625533140669. The reversal of 625533140661 is 166041335526.

It is an interprime number because it is at equal distance from previous prime (625533140653) and next prime (625533140669).

It is not a de Polignac number, because 625533140661 - 2³ = 625533140653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625533140669) 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, 729059176 + ... + 729060033.

It is an arithmetic number, because the mean of its divisors is an integer number (61241006820).

Almost surely, 2^625533140661 is an apocalyptic number.

It is an amenable number.

625533140661 is a deficient number, since it is larger than the sum of its proper divisors (354322968459).

625533140661 is a wasteful number, since it uses less digits than its factorization.

625533140661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1458119236.

The product of its (nonzero) digits is 388800, while the sum is 42.

The spelling of 625533140661 in words is "six hundred twenty-five billion, five hundred thirty-three million, one hundred forty thousand, six hundred sixty-one".