2155395554 has 16 divisors (see below), whose sum is σ = 3562766592. Its totient is φ = 971662608.

The previous prime is 2155395547. The next prime is 2155395563. The reversal of 2155395554 is 4555935512.

It is a happy number.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 962834 + ... + 965069.

It is an arithmetic number, because the mean of its divisors is an integer number (222672912).

Almost surely, 2^2155395554 is an apocalyptic number.

2155395554 is a deficient number, since it is larger than the sum of its proper divisors (1407371038).

2155395554 is a wasteful number, since it uses less digits than its factorization.

2155395554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1927961.

The product of its digits is 675000, while the sum is 44.

The square root of 2155395554 is about 46426.2377756372. The cubic root of 2155395554 is about 1291.7416440824.

The spelling of 2155395554 in words is "two billion, one hundred fifty-five million, three hundred ninety-five thousand, five hundred fifty-four".