77631316 has 48 divisors (see below), whose sum is σ = 169731072. Its totient is φ = 30297600.

The previous prime is 77631277. The next prime is 77631341. The reversal of 77631316 is 61313677.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12126 + ... + 17386.

It is an arithmetic number, because the mean of its divisors is an integer number (3536064).

Almost surely, 2^77631316 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 77631316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84865536).

77631316 is an abundant number, since it is smaller than the sum of its proper divisors (92099756).

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

77631316 is a wasteful number, since it uses less digits than its factorization.

77631316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5320 (or 5318 counting only the distinct ones).

The product of its digits is 15876, while the sum is 34.

The square root of 77631316 is about 8810.8635218121. The cubic root of 77631316 is about 426.5916163025.

The spelling of 77631316 in words is "seventy-seven million, six hundred thirty-one thousand, three hundred sixteen".