118777493551 has 4 divisors (see below), whose sum is σ = 125028940600. Its totient is φ = 112526046504.

The previous prime is 118777493533. The next prime is 118777493561. The reversal of 118777493551 is 155394777811.

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

It is a cyclic number.

It is not a de Polignac number, because 118777493551 - 2¹⁷ = 118777362479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (118777493501) 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, 3125723496 + ... + 3125723533.

It is an arithmetic number, because the mean of its divisors is an integer number (31257235150).

Almost surely, 2^118777493551 is an apocalyptic number.

118777493551 is a deficient number, since it is larger than the sum of its proper divisors (6251447049).

118777493551 is an equidigital number, since it uses as much as digits as its factorization.

118777493551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6251447048.

The product of its digits is 7408800, while the sum is 58.

The spelling of 118777493551 in words is "one hundred eighteen billion, seven hundred seventy-seven million, four hundred ninety-three thousand, five hundred fifty-one".