77632639 has 16 divisors (see below), whose sum is σ = 92010240. Its totient is φ = 64117440.

The previous prime is 77632637. The next prime is 77632657. The reversal of 77632639 is 93623677.

It is not a de Polignac number, because 77632639 - 2¹ = 77632637 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77632595 and 77632604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77632631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22192 + ... + 25450.

It is an arithmetic number, because the mean of its divisors is an integer number (5750640).

Almost surely, 2^77632639 is an apocalyptic number.

77632639 is a deficient number, since it is larger than the sum of its proper divisors (14377601).

77632639 is a wasteful number, since it uses less digits than its factorization.

77632639 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3390.

The product of its digits is 285768, while the sum is 43.

The square root of 77632639 is about 8810.9385992640. The cubic root of 77632639 is about 426.5940396265.

The spelling of 77632639 in words is "seventy-seven million, six hundred thirty-two thousand, six hundred thirty-nine".