2056429291557 has 8 divisors (see below), whose sum is σ = 2741967119520. Its totient is φ = 1370922162320.

The previous prime is 2056429291547. The next prime is 2056429291573. The reversal of 2056429291557 is 7551929246502.

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

It is a cyclic number.

It is not a de Polignac number, because 2056429291557 - 2⁴ = 2056429291541 is a prime.

It is a super-2 number, since 2×2056429291557² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2056429291497 and 2056429291506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2056429291547) 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, 7517919 + ... + 7786652.

It is an arithmetic number, because the mean of its divisors is an integer number (342745889940).

Almost surely, 2^{2056429291557} is an apocalyptic number.

It is an amenable number.

2056429291557 is a deficient number, since it is larger than the sum of its proper divisors (685537827963).

2056429291557 is a wasteful number, since it uses less digits than its factorization.

2056429291557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15349363.

The product of its (nonzero) digits is 13608000, while the sum is 57.

The spelling of 2056429291557 in words is "two trillion, fifty-six billion, four hundred twenty-nine million, two hundred ninety-one thousand, five hundred fifty-seven".