76878611645 has 8 divisors (see below), whose sum is σ = 100641091680. Its totient is φ = 55911717520.

The previous prime is 76878611629. The next prime is 76878611647. The reversal of 76878611645 is 54611687867.

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

It is not a de Polignac number, because 76878611645 - 2⁴ = 76878611629 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76878611647) 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, 698896415 + ... + 698896524.

It is an arithmetic number, because the mean of its divisors is an integer number (12580136460).

Almost surely, 2^76878611645 is an apocalyptic number.

It is an amenable number.

76878611645 is a deficient number, since it is larger than the sum of its proper divisors (23762480035).

76878611645 is a wasteful number, since it uses less digits than its factorization.

76878611645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1397792955.

The product of its digits is 13547520, while the sum is 59.

The spelling of 76878611645 in words is "seventy-six billion, eight hundred seventy-eight million, six hundred eleven thousand, six hundred forty-five".