251826101128140 has 144 divisors (see below), whose sum is σ = 885761889766656. Its totient is φ = 52327501522560.

The previous prime is 251826101128097. The next prime is 251826101128159. The reversal of 251826101128140 is 41821101628152.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 251826101128092 and 251826101128101.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2477577094 + ... + 2477678733.

Almost surely, 2^{251826101128140} is an apocalyptic number.

251826101128140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251826101128140 is an abundant number, since it is smaller than the sum of its proper divisors (633935788638516).

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

251826101128140 is a wasteful number, since it uses less digits than its factorization.

251826101128140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4955255868 (or 4955255855 counting only the distinct ones).

The product of its (nonzero) digits is 61440, while the sum is 42.

The spelling of 251826101128140 in words is "two hundred fifty-one trillion, eight hundred twenty-six billion, one hundred one million, one hundred twenty-eight thousand, one hundred forty".