1973791155 has 64 divisors (see below), whose sum is σ = 3851504640. Its totient is φ = 843042816.

The previous prime is 1973791153. The next prime is 1973791189. The reversal of 1973791155 is 5511973791.

It is not a de Polignac number, because 1973791155 - 2¹ = 1973791153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1973791151) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 138859 + ... + 152411.

It is an arithmetic number, because the mean of its divisors is an integer number (60179760).

Almost surely, 2^1973791155 is an apocalyptic number.

1973791155 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1973791155 is a deficient number, since it is larger than the sum of its proper divisors (1877713485).

1973791155 is a wasteful number, since it uses less digits than its factorization.

1973791155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13660.

The product of its digits is 297675, while the sum is 48.

The square root of 1973791155 is about 44427.3694359682. The cubic root of 1973791155 is about 1254.3933206305.

The spelling of 1973791155 in words is "one billion, nine hundred seventy-three million, seven hundred ninety-one thousand, one hundred fifty-five".