625144243440 has 40 divisors (see below), whose sum is σ = 1937947155408. Its totient is φ = 166705131520.

The previous prime is 625144243433. The next prime is 625144243453. The reversal of 625144243440 is 44342441526.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1302383601 + ... + 1302384080.

Almost surely, 2^625144243440 is an apocalyptic number.

625144243440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

625144243440 is an abundant number, since it is smaller than the sum of its proper divisors (1312802911968).

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

625144243440 is a wasteful number, since it uses less digits than its factorization.

625144243440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2604767697 (or 2604767691 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 39.

Adding to 625144243440 its reverse (44342441526), we get a palindrome (669486684966).

The spelling of 625144243440 in words is "six hundred twenty-five billion, one hundred forty-four million, two hundred forty-three thousand, four hundred forty".