2057117678 has 64 divisors (see below), whose sum is σ = 3955944960. Its totient is φ = 778982400.

The previous prime is 2057117627. The next prime is 2057117681. The reversal of 2057117678 is 8767117502.

It is a super-2 number, since 2×2057117678² = 8463466282280223368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1595258 + ... + 1596546.

It is an arithmetic number, because the mean of its divisors is an integer number (61811640).

Almost surely, 2^2057117678 is an apocalyptic number.

2057117678 is a deficient number, since it is larger than the sum of its proper divisors (1898827282).

2057117678 is a wasteful number, since it uses less digits than its factorization.

2057117678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1593.

The product of its (nonzero) digits is 164640, while the sum is 44.

The square root of 2057117678 is about 45355.4591862986. The cubic root of 2057117678 is about 1271.8026105999.

The spelling of 2057117678 in words is "two billion, fifty-seven million, one hundred seventeen thousand, six hundred seventy-eight".