1957191146 has 16 divisors (see below), whose sum is σ = 3028099464. Its totient is φ = 948052224.

The previous prime is 1957191143. The next prime is 1957191199. The reversal of 1957191146 is 6411917591.

It can be written as a sum of positive squares in 4 ways, for example, as 1906282921 + 50908225 = 43661^2 + 7135^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1957191097 and 1957191106.

It is not an unprimeable number, because it can be changed into a prime (1957191143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39515 + ... + 73998.

Almost surely, 2^1957191146 is an apocalyptic number.

1957191146 is a deficient number, since it is larger than the sum of its proper divisors (1070908318).

1957191146 is a wasteful number, since it uses less digits than its factorization.

1957191146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113785.

The product of its digits is 68040, while the sum is 44.

The square root of 1957191146 is about 44240.1530964801. The cubic root of 1957191146 is about 1250.8668432073.

The spelling of 1957191146 in words is "one billion, nine hundred fifty-seven million, one hundred ninety-one thousand, one hundred forty-six".