78170151813 has 24 divisors (see below), whose sum is σ = 112908745440. Its totient is φ = 48084379200.

The previous prime is 78170151809. The next prime is 78170151841. The reversal of 78170151813 is 31815107187.

It is not a de Polignac number, because 78170151813 - 2² = 78170151809 is a prime.

It is a super-2 number, since 2×78170151813² (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 (78170151803) 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, 1215363 + ... + 1278063.

It is an arithmetic number, because the mean of its divisors is an integer number (4704531060).

Almost surely, 2^78170151813 is an apocalyptic number.

It is an amenable number.

78170151813 is a deficient number, since it is larger than the sum of its proper divisors (34738593627).

78170151813 is a wasteful number, since it uses less digits than its factorization.

78170151813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65189 (or 65176 counting only the distinct ones).

The product of its (nonzero) digits is 47040, while the sum is 42.

The spelling of 78170151813 in words is "seventy-eight billion, one hundred seventy million, one hundred fifty-one thousand, eight hundred thirteen".