60778757555 has 4 divisors (see below), whose sum is σ = 72934509072. Its totient is φ = 48623006040.

The previous prime is 60778757549. The next prime is 60778757581. The reversal of 60778757555 is 55575787706.

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

It is not a de Polignac number, because 60778757555 - 2¹⁰ = 60778756531 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6077875751 + ... + 6077875760.

It is an arithmetic number, because the mean of its divisors is an integer number (18233627268).

Almost surely, 2^60778757555 is an apocalyptic number.

60778757555 is a deficient number, since it is larger than the sum of its proper divisors (12155751517).

60778757555 is a wasteful number, since it uses less digits than its factorization.

60778757555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12155751516.

The product of its (nonzero) digits is 72030000, while the sum is 62.

The spelling of 60778757555 in words is "sixty billion, seven hundred seventy-eight million, seven hundred fifty-seven thousand, five hundred fifty-five".