1252662891636 has 48 divisors (see below), whose sum is σ = 3232790457344. Its totient is φ = 375017579136.

The previous prime is 1252662891629. The next prime is 1252662891637. The reversal of 1252662891636 is 6361982662521.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1252662891637) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108506260 + ... + 108517803.

Almost surely, 2^{1252662891636} is an apocalyptic number.

It is an amenable number.

1252662891636 is an abundant number, since it is smaller than the sum of its proper divisors (1980127565708).

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

1252662891636 is a wasteful number, since it uses less digits than its factorization.

1252662891636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217024120 (or 217024118 counting only the distinct ones).

The product of its digits is 11197440, while the sum is 57.

The spelling of 1252662891636 in words is "one trillion, two hundred fifty-two billion, six hundred sixty-two million, eight hundred ninety-one thousand, six hundred thirty-six".