2251153102644 has 36 divisors (see below), whose sum is σ = 5691213642660. Its totient is φ = 750279024000.

The previous prime is 2251153102633. The next prime is 2251153102661. The reversal of 2251153102644 is 4462013511522.

2251153102644 is a `hidden beast` number, since 2 + 2 + 5 + 1 + 1 + 5 + 3 + 1 + 0 + 2 + 644 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 569514734244 + 1681638368400 = 754662^2 + 1296780^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2251153102599 and 2251153102608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4129107 + ... + 4642394.

Almost surely, 2^{2251153102644} is an apocalyptic number.

It is an amenable number.

2251153102644 is an abundant number, since it is smaller than the sum of its proper divisors (3440060540016).

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

2251153102644 is a wasteful number, since it uses less digits than its factorization.

2251153102644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8778640 (or 8778635 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 2251153102644 in words is "two trillion, two hundred fifty-one billion, one hundred fifty-three million, one hundred two thousand, six hundred forty-four".