7942450861 has 4 divisors (see below), whose sum is σ = 7958627424. Its totient is φ = 7926274300.

The previous prime is 7942450853. The next prime is 7942450871. The reversal of 7942450861 is 1680542497.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 7942450861 - 2³ = 7942450853 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 (7942450871) 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, 8087545 + ... + 8088526.

It is an arithmetic number, because the mean of its divisors is an integer number (1989656856).

Almost surely, 2^7942450861 is an apocalyptic number.

It is an amenable number.

7942450861 is a deficient number, since it is larger than the sum of its proper divisors (16176563).

7942450861 is a wasteful number, since it uses less digits than its factorization.

7942450861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16176562.

The product of its (nonzero) digits is 483840, while the sum is 46.

The square root of 7942450861 is about 89120.4289767503. The cubic root of 7942450861 is about 1995.1926925725.

The spelling of 7942450861 in words is "seven billion, nine hundred forty-two million, four hundred fifty thousand, eight hundred sixty-one".