77070400478 has 4 divisors (see below), whose sum is σ = 115605600720. Its totient is φ = 38535200238.

The previous prime is 77070400417. The next prime is 77070400487. The reversal of 77070400478 is 87400407077.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19267600118 + ... + 19267600121.

It is an arithmetic number, because the mean of its divisors is an integer number (28901400180).

Almost surely, 2^77070400478 is an apocalyptic number.

77070400478 is a deficient number, since it is larger than the sum of its proper divisors (38535200242).

77070400478 is a wasteful number, since it uses less digits than its factorization.

77070400478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38535200241.

The product of its (nonzero) digits is 307328, while the sum is 44.

The spelling of 77070400478 in words is "seventy-seven billion, seventy million, four hundred thousand, four hundred seventy-eight".