77134631744 has 56 divisors (see below), whose sum is σ = 155508643008. Its totient is φ = 37953377280.

The previous prime is 77134631741. The next prime is 77134631807. The reversal of 77134631744 is 44713643177.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77134631741) 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, 2470052 + ... + 2501084.

Almost surely, 2^77134631744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 77134631744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77754321504).

77134631744 is an abundant number, since it is smaller than the sum of its proper divisors (78374011264).

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

77134631744 is a wasteful number, since it uses less digits than its factorization.

77134631744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31663 (or 31653 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 47.

The spelling of 77134631744 in words is "seventy-seven billion, one hundred thirty-four million, six hundred thirty-one thousand, seven hundred forty-four".