77578057499 has 8 divisors (see below), whose sum is σ = 84973937760. Its totient is φ = 70496895616.

The previous prime is 77578057493. The next prime is 77578057511. The reversal of 77578057499 is 99475087577.

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 77578057499 - 2⁸ = 77578057243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77578057493) 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, 78679079 + ... + 78680064.

It is an arithmetic number, because the mean of its divisors is an integer number (10621742220).

Almost surely, 2^77578057499 is an apocalyptic number.

77578057499 is a deficient number, since it is larger than the sum of its proper divisors (7395880261).

77578057499 is a wasteful number, since it uses less digits than its factorization.

77578057499 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157359189.

The product of its (nonzero) digits is 155584800, while the sum is 68.

The spelling of 77578057499 in words is "seventy-seven billion, five hundred seventy-eight million, fifty-seven thousand, four hundred ninety-nine".