1251636164340 has 96 divisors (see below), whose sum is σ = 3628563456000. Its totient is φ = 322026883200.

The previous prime is 1251636164333. The next prime is 1251636164447. The reversal of 1251636164340 is 434616361521.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1251636164292 and 1251636164301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 400840 + ... + 1632159.

It is an arithmetic number, because the mean of its divisors is an integer number (37797536000).

Almost surely, 2^{1251636164340} is an apocalyptic number.

1251636164340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1251636164340 is an abundant number, since it is smaller than the sum of its proper divisors (2376927291660).

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

1251636164340 is a wasteful number, since it uses less digits than its factorization.

1251636164340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2033373 (or 2033371 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 42.

The spelling of 1251636164340 in words is "one trillion, two hundred fifty-one billion, six hundred thirty-six million, one hundred sixty-four thousand, three hundred forty".