253661937640101 has 8 divisors (see below), whose sum is σ = 375795463170560. Its totient is φ = 169107958426716.

The previous prime is 253661937640091. The next prime is 253661937640127. The reversal of 253661937640101 is 101046739166352.

253661937640101 is a `hidden beast` number, since 2 + 5 + 3 + 6 + 619 + 3 + 7 + 6 + 4 + 0 + 10 + 1 = 666.

It is not a de Polignac number, because 253661937640101 - 2⁶ = 253661937640037 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253661937640151) 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, 4697443289605 + ... + 4697443289658.

It is an arithmetic number, because the mean of its divisors is an integer number (46974432896320).

Almost surely, 2^{253661937640101} is an apocalyptic number.

It is an amenable number.

253661937640101 is a deficient number, since it is larger than the sum of its proper divisors (122133525530459).

253661937640101 is an equidigital number, since it uses as much as digits as its factorization.

253661937640101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9394886579272 (or 9394886579266 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 54.

The spelling of 253661937640101 in words is "two hundred fifty-three trillion, six hundred sixty-one billion, nine hundred thirty-seven million, six hundred forty thousand, one hundred one".