77631825 has 24 divisors (see below), whose sum is σ = 128800288. Its totient is φ = 41258880.

The previous prime is 77631793. The next prime is 77631839. The reversal of 77631825 is 52813677.

It is not a de Polignac number, because 77631825 - 2⁵ = 77631793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21822 + ... + 25128.

Almost surely, 2^77631825 is an apocalyptic number.

77631825 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

77631825 is a deficient number, since it is larger than the sum of its proper divisors (51168463).

77631825 is a wasteful number, since it uses less digits than its factorization.

77631825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3633 (or 3628 counting only the distinct ones).

The product of its digits is 70560, while the sum is 39.

The square root of 77631825 is about 8810.8924065613. The cubic root of 77631825 is about 426.5925486353.

The spelling of 77631825 in words is "seventy-seven million, six hundred thirty-one thousand, eight hundred twenty-five".