77641532 has 12 divisors (see below), whose sum is σ = 138100536. Its totient is φ = 38184240.

The previous prime is 77641523. The next prime is 77641547. The reversal of 77641532 is 23514677.

It is a junction number, because it is equal to n+sod(n) for n = 77641492 and 77641501.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 158858 + ... + 159345.

It is an arithmetic number, because the mean of its divisors is an integer number (11508378).

Almost surely, 2^77641532 is an apocalyptic number.

It is an amenable number.

77641532 is a deficient number, since it is larger than the sum of its proper divisors (60459004).

77641532 is a wasteful number, since it uses less digits than its factorization.

77641532 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 318268 (or 318266 counting only the distinct ones).

The product of its digits is 35280, while the sum is 35.

The square root of 77641532 is about 8811.4432416035. The cubic root of 77641532 is about 426.6103281189.

The spelling of 77641532 in words is "seventy-seven million, six hundred forty-one thousand, five hundred thirty-two".