654655251261 has 128 divisors (see below), whose sum is σ = 1050993377280. Its totient is φ = 358444800000.

The previous prime is 654655251247. The next prime is 654655251277. The reversal of 654655251261 is 162152556456.

It is not a de Polignac number, because 654655251261 - 2⁶ = 654655251197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 654655251261.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (654655252261) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 128841241 + ... + 128846321.

It is an arithmetic number, because the mean of its divisors is an integer number (8210885760).

Almost surely, 2^654655251261 is an apocalyptic number.

It is an amenable number.

654655251261 is a deficient number, since it is larger than the sum of its proper divisors (396338126019).

654655251261 is a wasteful number, since it uses less digits than its factorization.

654655251261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5299.

The product of its digits is 2160000, while the sum is 48.

The spelling of 654655251261 in words is "six hundred fifty-four billion, six hundred fifty-five million, two hundred fifty-one thousand, two hundred sixty-one".