625821905090 has 16 divisors (see below), whose sum is σ = 1162817475840. Its totient is φ = 242253640560.

The previous prime is 625821905089. The next prime is 625821905119. The reversal of 625821905090 is 90509128526.

It is a Curzon 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, 1009389860 + ... + 1009390479.

It is an arithmetic number, because the mean of its divisors is an integer number (72676092240).

Almost surely, 2^625821905090 is an apocalyptic number.

625821905090 is a deficient number, since it is larger than the sum of its proper divisors (536995570750).

625821905090 is a wasteful number, since it uses less digits than its factorization.

625821905090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2018780377.

The product of its (nonzero) digits is 388800, while the sum is 47.

The spelling of 625821905090 in words is "six hundred twenty-five billion, eight hundred twenty-one million, nine hundred five thousand, ninety".