20257770751161 has 8 divisors (see below), whose sum is σ = 27110030231424. Its totient is φ = 13455345885840.

The previous prime is 20257770751117. The next prime is 20257770751171. The reversal of 20257770751161 is 16115707775202.

It is a happy number.

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

It is not a de Polignac number, because 20257770751161 - 2³⁰ = 20256697009337 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20257770751171) 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, 12458652786 + ... + 12458654411.

It is an arithmetic number, because the mean of its divisors is an integer number (3388753778928).

Almost surely, 2^{20257770751161} is an apocalyptic number.

It is an amenable number.

20257770751161 is a deficient number, since it is larger than the sum of its proper divisors (6852259480263).

20257770751161 is a wasteful number, since it uses less digits than its factorization.

20257770751161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24917307471.

The product of its (nonzero) digits is 1440600, while the sum is 51.

The spelling of 20257770751161 in words is "twenty trillion, two hundred fifty-seven billion, seven hundred seventy million, seven hundred fifty-one thousand, one hundred sixty-one".