78715478487 has 8 divisors (see below), whose sum is σ = 105140392704. Its totient is φ = 52383774968.

The previous prime is 78715478483. The next prime is 78715478503. The reversal of 78715478487 is 78487451787.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 78715478487 - 2² = 78715478483 is a prime.

It is a super-2 number, since 2×78715478487² (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 (78715478483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23300703 + ... + 23304080.

It is an arithmetic number, because the mean of its divisors is an integer number (13142549088).

Almost surely, 2^78715478487 is an apocalyptic number.

78715478487 is a deficient number, since it is larger than the sum of its proper divisors (26424914217).

78715478487 is a wasteful number, since it uses less digits than its factorization.

78715478487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46605349.

The product of its digits is 98344960, while the sum is 66.

The spelling of 78715478487 in words is "seventy-eight billion, seven hundred fifteen million, four hundred seventy-eight thousand, four hundred eighty-seven".