1963172155 has 32 divisors (see below), whose sum is σ = 2866631040. Its totient is φ = 1259919360.

The previous prime is 1963172119. The next prime is 1963172201. The reversal of 1963172155 is 5512713691.

It is not a de Polignac number, because 1963172155 - 2¹¹ = 1963170107 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 98581 + ... + 116809.

It is an arithmetic number, because the mean of its divisors is an integer number (89582220).

Almost surely, 2^1963172155 is an apocalyptic number.

1963172155 is a deficient number, since it is larger than the sum of its proper divisors (903458885).

1963172155 is a wasteful number, since it uses less digits than its factorization.

1963172155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18439.

The product of its digits is 56700, while the sum is 40.

The square root of 1963172155 is about 44307.6985974221. The cubic root of 1963172155 is about 1252.1397282272.

The spelling of 1963172155 in words is "one billion, nine hundred sixty-three million, one hundred seventy-two thousand, one hundred fifty-five".