1057021145561 has 8 divisors (see below), whose sum is σ = 1074369480000. Its totient is φ = 1039673460240.

The previous prime is 1057021145533. The next prime is 1057021145569. The reversal of 1057021145561 is 1655411207501.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1057021145561 is a prime.

It is a super-2 number, since 2×1057021145561² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1057021145569) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3982790 + ... + 4239888.

It is an arithmetic number, because the mean of its divisors is an integer number (134296185000).

Almost surely, 2^{1057021145561} is an apocalyptic number.

It is an amenable number.

1057021145561 is a deficient number, since it is larger than the sum of its proper divisors (17348334439).

1057021145561 is an equidigital number, since it uses as much as digits as its factorization.

1057021145561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324559.

The product of its (nonzero) digits is 42000, while the sum is 38.

The spelling of 1057021145561 in words is "one trillion, fifty-seven billion, twenty-one million, one hundred forty-five thousand, five hundred sixty-one".