78151700321871 has 64 divisors (see below), whose sum is σ = 121819248884736. Its totient is φ = 44040836044800.

The previous prime is 78151700321861. The next prime is 78151700321921. The reversal of 78151700321871 is 17812300715187.

It is not a de Polignac number, because 78151700321871 - 2²⁵ = 78151666767439 is a prime.

It is a super-2 number, since 2×78151700321871² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78151700321801) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 22720345 + ... + 25932941.

It is an arithmetic number, because the mean of its divisors is an integer number (1903425763824).

Almost surely, 2^{78151700321871} is an apocalyptic number.

78151700321871 is a deficient number, since it is larger than the sum of its proper divisors (43667548562865).

78151700321871 is a wasteful number, since it uses less digits than its factorization.

78151700321871 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3213152.

The product of its (nonzero) digits is 658560, while the sum is 51.

The spelling of 78151700321871 in words is "seventy-eight trillion, one hundred fifty-one billion, seven hundred million, three hundred twenty-one thousand, eight hundred seventy-one".