78135479757 has 24 divisors (see below), whose sum is σ = 117285043200. Its totient is φ = 50071638240.

The previous prime is 78135479731. The next prime is 78135479791. The reversal of 78135479757 is 75797453187.

78135479757 is a `hidden beast` number, since 7 + 8 + 13 + 547 + 9 + 75 + 7 = 666.

It is not a de Polignac number, because 78135479757 - 2⁷ = 78135479629 is a prime.

It is a super-2 number, since 2×78135479757² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78135479694 and 78135479703.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78135479707) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 898213 + ... + 981354.

It is an arithmetic number, because the mean of its divisors is an integer number (4886876800).

Almost surely, 2^78135479757 is an apocalyptic number.

It is an amenable number.

78135479757 is a deficient number, since it is larger than the sum of its proper divisors (39149563443).

78135479757 is a wasteful number, since it uses less digits than its factorization.

78135479757 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1879753 (or 1879750 counting only the distinct ones).

The product of its digits is 51861600, while the sum is 63.

The spelling of 78135479757 in words is "seventy-eight billion, one hundred thirty-five million, four hundred seventy-nine thousand, seven hundred fifty-seven".