77105081478 has 16 divisors (see below), whose sum is σ = 154272449520. Its totient is φ = 25691312736.

The previous prime is 77105081461. The next prime is 77105081497. The reversal of 77105081478 is 87418050177.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2579173 + ... + 2608896.

It is an arithmetic number, because the mean of its divisors is an integer number (9642028095).

Almost surely, 2^77105081478 is an apocalyptic number.

77105081478 is an abundant number, since it is smaller than the sum of its proper divisors (77167368042).

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

77105081478 is a wasteful number, since it uses less digits than its factorization.

77105081478 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5190551.

The product of its (nonzero) digits is 439040, while the sum is 48.

The spelling of 77105081478 in words is "seventy-seven billion, one hundred five million, eighty-one thousand, four hundred seventy-eight".