1975821123057 has 32 divisors (see below), whose sum is σ = 2653228448640. Its totient is φ = 1307855808000.

The previous prime is 1975821123011. The next prime is 1975821123061. The reversal of 1975821123057 is 7503211285791.

It is a happy number.

It is not a de Polignac number, because 1975821123057 - 2⁸ = 1975821122801 is a prime.

It is a super-2 number, since 2×1975821123057² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1975821123007) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 315170119 + ... + 315176387.

It is an arithmetic number, because the mean of its divisors is an integer number (82913389020).

Almost surely, 2^{1975821123057} is an apocalyptic number.

It is an amenable number.

1975821123057 is a deficient number, since it is larger than the sum of its proper divisors (677407325583).

1975821123057 is a wasteful number, since it uses less digits than its factorization.

1975821123057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7825.

The product of its (nonzero) digits is 1058400, while the sum is 51.

The spelling of 1975821123057 in words is "one trillion, nine hundred seventy-five billion, eight hundred twenty-one million, one hundred twenty-three thousand, fifty-seven".