77454642 has 16 divisors (see below), whose sum is σ = 155560320. Its totient is φ = 25709712.

The previous prime is 77454631. The next prime is 77454673. The reversal of 77454642 is 24645477.

It is a self number, because there is not a number n which added to its sum of digits gives 77454642.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25573 + ... + 28440.

It is an arithmetic number, because the mean of its divisors is an integer number (9722520).

Almost surely, 2^77454642 is an apocalyptic number.

77454642 is an abundant number, since it is smaller than the sum of its proper divisors (78105678).

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

77454642 is a wasteful number, since it uses less digits than its factorization.

77454642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54257.

The product of its digits is 188160, while the sum is 39.

The square root of 77454642 is about 8800.8318924974. The cubic root of 77454642 is about 426.2677569048.

The spelling of 77454642 in words is "seventy-seven million, four hundred fifty-four thousand, six hundred forty-two".