77151648 has 48 divisors (see below), whose sum is σ = 231456960. Its totient is φ = 22043136.

The previous prime is 77151619. The next prime is 77151667. The reversal of 77151648 is 84615177.

It is a tau number, because it is divible by the number of its divisors (48).

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, 56733 + ... + 58076.

It is an arithmetic number, because the mean of its divisors is an integer number (4822020).

Almost surely, 2^77151648 is an apocalyptic number.

It is an amenable number.

77151648 is an abundant number, since it is smaller than the sum of its proper divisors (154305312).

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

77151648 is a wasteful number, since it uses less digits than its factorization.

77151648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114829 (or 114821 counting only the distinct ones).

The product of its digits is 47040, while the sum is 39.

The square root of 77151648 is about 8783.6010838380. The cubic root of 77151648 is about 425.7111930812.

The spelling of 77151648 in words is "seventy-seven million, one hundred fifty-one thousand, six hundred forty-eight".