625212509660 has 24 divisors (see below), whose sum is σ = 1313114302080. Its totient is φ = 250052997824.

The previous prime is 625212509617. The next prime is 625212509749. The reversal of 625212509660 is 66905212526.

It is a super-3 number, since 3×625212509660³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1839884 + ... + 2153043.

It is an arithmetic number, because the mean of its divisors is an integer number (54713095920).

Almost surely, 2^625212509660 is an apocalyptic number.

It is an amenable number.

625212509660 is an abundant number, since it is smaller than the sum of its proper divisors (687901792420).

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

625212509660 is a wasteful number, since it uses less digits than its factorization.

625212509660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000765 (or 4000763 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 625212509660 in words is "six hundred twenty-five billion, two hundred twelve million, five hundred nine thousand, six hundred sixty".