19377772155 has 80 divisors (see below), whose sum is σ = 41788327680. Its totient is φ = 8392154688.

The previous prime is 19377772151. The next prime is 19377772157. The reversal of 19377772155 is 55127777391.

It is not a de Polignac number, because 19377772155 - 2² = 19377772151 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19377772151) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 126009 + ... + 233738.

It is an arithmetic number, because the mean of its divisors is an integer number (522354096).

Almost surely, 2^19377772155 is an apocalyptic number.

19377772155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

19377772155 is an abundant number, since it is smaller than the sum of its proper divisors (22410555525).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19377772155 is a wasteful number, since it uses less digits than its factorization.

19377772155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 359790 (or 359781 counting only the distinct ones).

The product of its digits is 3241350, while the sum is 54.

The spelling of 19377772155 in words is "nineteen billion, three hundred seventy-seven million, seven hundred seventy-two thousand, one hundred fifty-five".