654720799161 has 96 divisors (see below), whose sum is σ = 1040437675008. Its totient is φ = 363013297920.

The previous prime is 654720799157. The next prime is 654720799219. The reversal of 654720799161 is 161997027456.

It is a happy number.

It is not a de Polignac number, because 654720799161 - 2² = 654720799157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (654720099161) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 478946500 + ... + 478947866.

It is an arithmetic number, because the mean of its divisors is an integer number (10837892448).

Almost surely, 2^654720799161 is an apocalyptic number.

It is an amenable number.

654720799161 is a deficient number, since it is larger than the sum of its proper divisors (385716875847).

654720799161 is a wasteful number, since it uses less digits than its factorization.

654720799161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111 (or 2098 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 57.

The spelling of 654720799161 in words is "six hundred fifty-four billion, seven hundred twenty million, seven hundred ninety-nine thousand, one hundred sixty-one".