158320405779 has 16 divisors (see below), whose sum is σ = 212665622400. Its totient is φ = 104762750976.

The previous prime is 158320405757. The next prime is 158320405807. The reversal of 158320405779 is 977504023851.

It is not a de Polignac number, because 158320405779 - 2¹² = 158320401683 is a prime.

It is not an unprimeable number, because it can be changed into a prime (158320405709) 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, 165532 + ... + 586550.

It is an arithmetic number, because the mean of its divisors is an integer number (13291601400).

Almost surely, 2^158320405779 is an apocalyptic number.

158320405779 is a deficient number, since it is larger than the sum of its proper divisors (54345216621).

158320405779 is a wasteful number, since it uses less digits than its factorization.

158320405779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 421954.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The spelling of 158320405779 in words is "one hundred fifty-eight billion, three hundred twenty million, four hundred five thousand, seven hundred seventy-nine".