77754022147 has 4 divisors (see below), whose sum is σ = 77760286416. Its totient is φ = 77747757880.

The previous prime is 77754022117. The next prime is 77754022189. The reversal of 77754022147 is 74122045777.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77754022147 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77754022097 and 77754022106.

It is not an unprimeable number, because it can be changed into a prime (77754022117) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3113479 + ... + 3138352.

It is an arithmetic number, because the mean of its divisors is an integer number (19440071604).

Almost surely, 2^77754022147 is an apocalyptic number.

77754022147 is a deficient number, since it is larger than the sum of its proper divisors (6264269).

77754022147 is a wasteful number, since it uses less digits than its factorization.

77754022147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6264268.

The product of its (nonzero) digits is 768320, while the sum is 46.

The spelling of 77754022147 in words is "seventy-seven billion, seven hundred fifty-four million, twenty-two thousand, one hundred forty-seven".