77641442 has 16 divisors (see below), whose sum is σ = 117585600. Its totient is φ = 38448432.

The previous prime is 77641441. The next prime is 77641457. The reversal of 77641442 is 24414677.

It is not an unprimeable number, because it can be changed into a prime (77641441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148193 + ... + 148715.

It is an arithmetic number, because the mean of its divisors is an integer number (7349100).

Almost surely, 2^77641442 is an apocalyptic number.

77641442 is a deficient number, since it is larger than the sum of its proper divisors (39944158).

77641442 is a wasteful number, since it uses less digits than its factorization.

77641442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097.

The product of its digits is 37632, while the sum is 35.

The square root of 77641442 is about 8811.4381346066. The cubic root of 77641442 is about 426.6101632804.

The spelling of 77641442 in words is "seventy-seven million, six hundred forty-one thousand, four hundred forty-two".