253687391155 has 32 divisors (see below), whose sum is σ = 354165073920. Its totient is φ = 172397637120.

The previous prime is 253687391147. The next prime is 253687391159. The reversal of 253687391155 is 551193786352.

It is a happy number.

It is not a de Polignac number, because 253687391155 - 2³ = 253687391147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a junction number, because it is equal to n+sod(n) for n = 253687391096 and 253687391105.

It is not an unprimeable number, because it can be changed into a prime (253687391159) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 846019 + ... + 1105948.

It is an arithmetic number, because the mean of its divisors is an integer number (11067658560).

Almost surely, 2^253687391155 is an apocalyptic number.

253687391155 is a deficient number, since it is larger than the sum of its proper divisors (100477682765).

253687391155 is a wasteful number, since it uses less digits than its factorization.

253687391155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952139.

The product of its digits is 6804000, while the sum is 55.

The spelling of 253687391155 in words is "two hundred fifty-three billion, six hundred eighty-seven million, three hundred ninety-one thousand, one hundred fifty-five".