78465515348715 has 16 divisors (see below), whose sum is σ = 136957990427136. Its totient is φ = 38043886229600.

The previous prime is 78465515348641. The next prime is 78465515348837. The reversal of 78465515348715 is 51784351556487.

It is not a de Polignac number, because 78465515348715 - 2⁷ = 78465515348587 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 78465515348715.

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, 237774288771 + ... + 237774289100.

It is an arithmetic number, because the mean of its divisors is an integer number (8559874401696).

Almost surely, 2^{78465515348715} is an apocalyptic number.

78465515348715 is a deficient number, since it is larger than the sum of its proper divisors (58492475078421).

78465515348715 is a wasteful number, since it uses less digits than its factorization.

78465515348715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475548577890.

The product of its digits is 564480000, while the sum is 69.

The spelling of 78465515348715 in words is "seventy-eight trillion, four hundred sixty-five billion, five hundred fifteen million, three hundred forty-eight thousand, seven hundred fifteen".