654687021172 has 24 divisors (see below), whose sum is σ = 1146936333312. Its totient is φ = 326991069600.

The previous prime is 654687021077. The next prime is 654687021173. The reversal of 654687021172 is 271120786456.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654687021173) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21612397 + ... + 21642667.

It is an arithmetic number, because the mean of its divisors is an integer number (47789013888).

Almost surely, 2^654687021172 is an apocalyptic number.

It is an amenable number.

654687021172 is a deficient number, since it is larger than the sum of its proper divisors (492249312140).

654687021172 is a wasteful number, since it uses less digits than its factorization.

654687021172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35919 (or 35917 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 49.

The spelling of 654687021172 in words is "six hundred fifty-four billion, six hundred eighty-seven million, twenty-one thousand, one hundred seventy-two".