2251036721136 has 40 divisors (see below), whose sum is σ = 6645917939584. Its totient is φ = 643153348800.

The previous prime is 2251036721123. The next prime is 2251036721173. The reversal of 2251036721136 is 6311276301522.

It is a junction number, because it is equal to n+sod(n) for n = 2251036721094 and 2251036721103.

It is a congruent 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, 3349756690 + ... + 3349757361.

Almost surely, 2^{2251036721136} is an apocalyptic number.

It is an amenable number.

2251036721136 is an abundant number, since it is smaller than the sum of its proper divisors (4394881218448).

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

2251036721136 is a wasteful number, since it uses less digits than its factorization.

2251036721136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6699514069 (or 6699514063 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 39.

The spelling of 2251036721136 in words is "two trillion, two hundred fifty-one billion, thirty-six million, seven hundred twenty-one thousand, one hundred thirty-six".