77220743462 has 4 divisors (see below), whose sum is σ = 115831115196. Its totient is φ = 38610371730.

The previous prime is 77220743459. The next prime is 77220743471. The reversal of 77220743462 is 26434702277.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19305185864 + ... + 19305185867.

It is an arithmetic number, because the mean of its divisors is an integer number (28957778799).

Almost surely, 2^77220743462 is an apocalyptic number.

77220743462 is a deficient number, since it is larger than the sum of its proper divisors (38610371734).

77220743462 is a wasteful number, since it uses less digits than its factorization.

77220743462 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38610371733.

The product of its (nonzero) digits is 790272, while the sum is 44.

The spelling of 77220743462 in words is "seventy-seven billion, two hundred twenty million, seven hundred forty-three thousand, four hundred sixty-two".