77760396554 has 4 divisors (see below), whose sum is σ = 116640594834. Its totient is φ = 38880198276.

The previous prime is 77760396533. The next prime is 77760396583. The reversal of 77760396554 is 45569306777.

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

It can be written as a sum of positive squares in only one way, i.e., 65098971025 + 12661425529 = 255145^2 + 112523^2 .

It is a junction number, because it is equal to n+sod(n) for n = 77760396493 and 77760396502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19440099137 + ... + 19440099140.

Almost surely, 2^77760396554 is an apocalyptic number.

77760396554 is a deficient number, since it is larger than the sum of its proper divisors (38880198280).

77760396554 is a wasteful number, since it uses less digits than its factorization.

77760396554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38880198279.

The product of its (nonzero) digits is 33339600, while the sum is 59.

The spelling of 77760396554 in words is "seventy-seven billion, seven hundred sixty million, three hundred ninety-six thousand, five hundred fifty-four".