78504383077715 has 16 divisors (see below), whose sum is σ = 111375676486080. Its totient is φ = 51975315692160.

The previous prime is 78504383077693. The next prime is 78504383077763. The reversal of 78504383077715 is 51777038340587.

It is a happy number.

It is not a de Polignac number, because 78504383077715 - 2⁴² = 74106336566611 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38672108876 + ... + 38672110905.

It is an arithmetic number, because the mean of its divisors is an integer number (6960979780380).

Almost surely, 2^{78504383077715} is an apocalyptic number.

78504383077715 is a deficient number, since it is larger than the sum of its proper divisors (32871293408365).

78504383077715 is a wasteful number, since it uses less digits than its factorization.

78504383077715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77344219822.

The product of its (nonzero) digits is 138297600, while the sum is 65.

The spelling of 78504383077715 in words is "seventy-eight trillion, five hundred four billion, three hundred eighty-three million, seventy-seven thousand, seven hundred fifteen".