992947861751 has 4 divisors (see below), whose sum is σ = 992956750632. Its totient is φ = 992938972872.

The previous prime is 992947861709. The next prime is 992947861817. The reversal of 992947861751 is 157168749299.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 992947861751 - 2²⁶ = 992880752887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (992947861951) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4274720 + ... + 4501013.

It is an arithmetic number, because the mean of its divisors is an integer number (248239187658).

Almost surely, 2^992947861751 is an apocalyptic number.

992947861751 is a deficient number, since it is larger than the sum of its proper divisors (8888881).

992947861751 is a wasteful number, since it uses less digits than its factorization.

992947861751 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8888880.

The product of its digits is 68584320, while the sum is 68.

The spelling of 992947861751 in words is "nine hundred ninety-two billion, nine hundred forty-seven million, eight hundred sixty-one thousand, seven hundred fifty-one".