77194643662 has 4 divisors (see below), whose sum is σ = 115791965496. Its totient is φ = 38597321830.

The previous prime is 77194643657. The next prime is 77194643663. The reversal of 77194643662 is 26634649177.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77194643663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19298660914 + ... + 19298660917.

It is an arithmetic number, because the mean of its divisors is an integer number (28947991374).

Almost surely, 2^77194643662 is an apocalyptic number.

77194643662 is a deficient number, since it is larger than the sum of its proper divisors (38597321834).

77194643662 is a wasteful number, since it uses less digits than its factorization.

77194643662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38597321833.

The product of its digits is 9144576, while the sum is 55.

The spelling of 77194643662 in words is "seventy-seven billion, one hundred ninety-four million, six hundred forty-three thousand, six hundred sixty-two".