253128297378 has 16 divisors (see below), whose sum is σ = 552279921696. Its totient is φ = 76705544640.

The previous prime is 253128297319. The next prime is 253128297407. The reversal of 253128297378 is 873792821352.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1917638551 + ... + 1917638682.

It is an arithmetic number, because the mean of its divisors is an integer number (34517495106).

Almost surely, 2^253128297378 is an apocalyptic number.

253128297378 is an abundant number, since it is smaller than the sum of its proper divisors (299151624318).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

253128297378 is a wasteful number, since it uses less digits than its factorization.

253128297378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3835277249.

The product of its digits is 10160640, while the sum is 57.

The spelling of 253128297378 in words is "two hundred fifty-three billion, one hundred twenty-eight million, two hundred ninety-seven thousand, three hundred seventy-eight".