625105520 has 80 divisors (see below), whose sum is σ = 1569274560. Its totient is φ = 230203392.

The previous prime is 625105457. The next prime is 625105541. The reversal of 625105520 is 25501526.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×625105520² = 781513822268940800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a self number, because there is not a number n which added to its sum of digits gives 625105520.

It is a congruent 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, 672416 + ... + 673344.

It is an arithmetic number, because the mean of its divisors is an integer number (19615932).

Almost surely, 2^625105520 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 625105520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (784637280).

625105520 is an abundant number, since it is smaller than the sum of its proper divisors (944169040).

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

625105520 is a wasteful number, since it uses less digits than its factorization.

625105520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602 (or 1596 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 26.

The square root of 625105520 is about 25002.1103109318. The cubic root of 625105520 is about 855.0360870739.

The spelling of 625105520 in words is "six hundred twenty-five million, one hundred five thousand, five hundred twenty".