1955806838955 has 48 divisors (see below), whose sum is σ = 3594312895680. Its totient is φ = 980416733184.

The previous prime is 1955806838933. The next prime is 1955806839029. The reversal of 1955806838955 is 5598386085591.

1955806838955 is a `hidden beast` number, since 1 + 9 + 5 + 580 + 6 + 8 + 38 + 9 + 5 + 5 = 666.

It is not a de Polignac number, because 1955806838955 - 2³³ = 1947216904363 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1152070 + ... + 2288859.

It is an arithmetic number, because the mean of its divisors is an integer number (74881518660).

Almost surely, 2^{1955806838955} is an apocalyptic number.

1955806838955 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1955806838955 is a deficient number, since it is larger than the sum of its proper divisors (1638506056725).

1955806838955 is a wasteful number, since it uses less digits than its factorization.

1955806838955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3441700 (or 3441697 counting only the distinct ones).

The product of its (nonzero) digits is 466560000, while the sum is 72.

The spelling of 1955806838955 in words is "one trillion, nine hundred fifty-five billion, eight hundred six million, eight hundred thirty-eight thousand, nine hundred fifty-five".