77370734778 has 8 divisors (see below), whose sum is σ = 154741469568. Its totient is φ = 25790244924.

The previous prime is 77370734737. The next prime is 77370734797. The reversal of 77370734778 is 87743707377.

It is a happy number.

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

77370734778 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6447561226 + ... + 6447561237.

It is an arithmetic number, because the mean of its divisors is an integer number (19342683696).

Almost surely, 2^77370734778 is an apocalyptic number.

77370734778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77370734778 is a wasteful number, since it uses less digits than its factorization.

77370734778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12895122468.

The product of its (nonzero) digits is 33882912, while the sum is 60.

The spelling of 77370734778 in words is "seventy-seven billion, three hundred seventy million, seven hundred thirty-four thousand, seven hundred seventy-eight".