625650451561044 has 864 divisors, whose sum is σ = 2032810788503040. Its totient is φ = 158734918397952.

The previous prime is 625650451561043. The next prime is 625650451561049. The reversal of 625650451561044 is 440165154056526.

It is a happy number.

625650451561044 is a `hidden beast` number, since 6 + 2 + 5 + 6 + 5 + 0 + 4 + 5 + 15 + 610 + 4 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (625650451561043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 115072730694 + ... + 115072736130.

Almost surely, 2^{625650451561044} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 625650451561044, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1016405394251520).

625650451561044 is an abundant number, since it is smaller than the sum of its proper divisors (1407160336941996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

625650451561044 is a wasteful number, since it uses less digits than its factorization.

625650451561044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6329 (or 6311 counting only the distinct ones).

The product of its (nonzero) digits is 17280000, while the sum is 54.

The spelling of 625650451561044 in words is "six hundred twenty-five trillion, six hundred fifty billion, four hundred fifty-one million, five hundred sixty-one thousand, forty-four".