79945563850 has 12 divisors (see below), whose sum is σ = 148698748854. Its totient is φ = 31978225520.

The previous prime is 79945563833. The next prime is 79945563851. The reversal of 79945563850 is 5836554997.

It can be written as a sum of positive squares in 3 ways, for example, as 75618950121 + 4326613729 = 274989^2 + 65777^2 .

It is not an unprimeable number, because it can be changed into a prime (79945563851) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 799455589 + ... + 799455688.

Almost surely, 2^79945563850 is an apocalyptic number.

79945563850 is a deficient number, since it is larger than the sum of its proper divisors (68753185004).

79945563850 is a wasteful number, since it uses less digits than its factorization.

79945563850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1598911289 (or 1598911284 counting only the distinct ones).

The product of its (nonzero) digits is 40824000, while the sum is 61.

The spelling of 79945563850 in words is "seventy-nine billion, nine hundred forty-five million, five hundred sixty-three thousand, eight hundred fifty".