2054991157 has 2 divisors, whose sum is σ = 2054991158. Its totient is φ = 2054991156.

The previous prime is 2054991149. The next prime is 2054991167. The reversal of 2054991157 is 7511994502.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2053811761 + 1179396 = 45319^2 + 1086^2 .

It is a cyclic number.

It is not a de Polignac number, because 2054991157 - 2³ = 2054991149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2054991167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1027495578 + 1027495579.

It is an arithmetic number, because the mean of its divisors is an integer number (1027495579).

Almost surely, 2^2054991157 is an apocalyptic number.

It is an amenable number.

2054991157 is a deficient number, since it is larger than the sum of its proper divisors (1).

2054991157 is an equidigital number, since it uses as much as digits as its factorization.

2054991157 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 113400, while the sum is 43.

The square root of 2054991157 is about 45332.0102907427. The cubic root of 2054991157 is about 1271.3642225511.

The spelling of 2054991157 in words is "two billion, fifty-four million, nine hundred ninety-one thousand, one hundred fifty-seven".