2161257562 has 8 divisors (see below), whose sum is σ = 3412512000. Its totient is φ = 1023753564.

The previous prime is 2161257557. The next prime is 2161257569. The reversal of 2161257562 is 2657521612.

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

It is not an unprimeable number, because it can be changed into a prime (2161257569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28437562 + ... + 28437637.

It is an arithmetic number, because the mean of its divisors is an integer number (426564000).

Almost surely, 2^2161257562 is an apocalyptic number.

2161257562 is a deficient number, since it is larger than the sum of its proper divisors (1251254438).

2161257562 is a wasteful number, since it uses less digits than its factorization.

2161257562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56875220.

The product of its digits is 50400, while the sum is 37.

The square root of 2161257562 is about 46489.3273988773. The cubic root of 2161257562 is about 1292.9116297202.

The spelling of 2161257562 in words is "two billion, one hundred sixty-one million, two hundred fifty-seven thousand, five hundred sixty-two".