653278985091 has 48 divisors (see below), whose sum is σ = 969779745792. Its totient is φ = 423539625600.

The previous prime is 653278985077. The next prime is 653278985143. The reversal of 653278985091 is 190589872356.

653278985091 is a `hidden beast` number, since 6 + 5 + 32 + 7 + 8 + 98 + 509 + 1 = 666.

It is not a de Polignac number, because 653278985091 - 2¹⁵ = 653278952323 is a prime.

It is not an unprimeable number, because it can be changed into a prime (653278975091) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 124883446 + ... + 124888676.

It is an arithmetic number, because the mean of its divisors is an integer number (20203744704).

Almost surely, 2^653278985091 is an apocalyptic number.

653278985091 is a deficient number, since it is larger than the sum of its proper divisors (316500760701).

653278985091 is a wasteful number, since it uses less digits than its factorization.

653278985091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6624 (or 6621 counting only the distinct ones).

The product of its (nonzero) digits is 32659200, while the sum is 63.

The spelling of 653278985091 in words is "six hundred fifty-three billion, two hundred seventy-eight million, nine hundred eighty-five thousand, ninety-one".