73178420115 has 32 divisors (see below), whose sum is σ = 119987352576. Its totient is φ = 38061930240.

The previous prime is 73178420111. The next prime is 73178420129. The reversal of 73178420115 is 51102487137.

It is a happy number.

It is not a de Polignac number, because 73178420115 - 2² = 73178420111 is a prime.

It is a super-2 number, since 2×73178420115² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (73178420111) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1680204 + ... + 1723206.

It is an arithmetic number, because the mean of its divisors is an integer number (3749604768).

Almost surely, 2^73178420115 is an apocalyptic number.

73178420115 is a deficient number, since it is larger than the sum of its proper divisors (46808932461).

73178420115 is a wasteful number, since it uses less digits than its factorization.

73178420115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45819.

The product of its (nonzero) digits is 47040, while the sum is 39.

The spelling of 73178420115 in words is "seventy-three billion, one hundred seventy-eight million, four hundred twenty thousand, one hundred fifteen".