253779929325 has 72 divisors (see below), whose sum is σ = 489622599648. Its totient is φ = 124909914240.

The previous prime is 253779929321. The next prime is 253779929369. The reversal of 253779929325 is 523929977352.

253779929325 is a `hidden beast` number, since 2 + 537 + 7 + 9 + 9 + 2 + 93 + 2 + 5 = 666.

It is not a de Polignac number, because 253779929325 - 2² = 253779929321 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (253779929321) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 20547802 + ... + 20560148.

It is an arithmetic number, because the mean of its divisors is an integer number (6800313884).

Almost surely, 2^253779929325 is an apocalyptic number.

253779929325 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

253779929325 is a deficient number, since it is larger than the sum of its proper divisors (235842670323).

253779929325 is a wasteful number, since it uses less digits than its factorization.

253779929325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19403 (or 19395 counting only the distinct ones).

The product of its digits is 64297800, while the sum is 63.

The spelling of 253779929325 in words is "two hundred fifty-three billion, seven hundred seventy-nine million, nine hundred twenty-nine thousand, three hundred twenty-five".