79780057101 has 12 divisors (see below), whose sum is σ = 115244420928. Its totient is φ = 53183676744.

The previous prime is 79780057067. The next prime is 79780057109. The reversal of 79780057101 is 10175008797.

It is a happy number.

79780057101 is a `hidden beast` number, since 7 + 9 + 78 + 0 + 0 + 571 + 0 + 1 = 666.

It is not a de Polignac number, because 79780057101 - 2¹⁵ = 79780024333 is a prime.

It is a super-2 number, since 2×79780057101² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79780057109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 79215 + ... + 407228.

It is an arithmetic number, because the mean of its divisors is an integer number (9603701744).

Almost surely, 2^79780057101 is an apocalyptic number.

It is an amenable number.

79780057101 is a deficient number, since it is larger than the sum of its proper divisors (35464363827).

79780057101 is a wasteful number, since it uses less digits than its factorization.

79780057101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504672 (or 504669 counting only the distinct ones).

The product of its (nonzero) digits is 123480, while the sum is 45.

The spelling of 79780057101 in words is "seventy-nine billion, seven hundred eighty million, fifty-seven thousand, one hundred one".