2157880675805 has 8 divisors (see below), whose sum is σ = 2589848066400. Its totient is φ = 1726043703696.

The previous prime is 2157880675789. The next prime is 2157880675843. The reversal of 2157880675805 is 5085760887512.

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 2157880675805 - 2⁴ = 2157880675789 is a prime.

It is a super-2 number, since 2×2157880675805² (a number of 25 digits) 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 7 ways as a sum of consecutive naturals, for example, 32568215 + ... + 32634404.

It is an arithmetic number, because the mean of its divisors is an integer number (323731008300).

Almost surely, 2^{2157880675805} is an apocalyptic number.

It is an amenable number.

2157880675805 is a deficient number, since it is larger than the sum of its proper divisors (431967390595).

2157880675805 is an equidigital number, since it uses as much as digits as its factorization.

2157880675805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65209243.

The product of its (nonzero) digits is 37632000, while the sum is 62.

The spelling of 2157880675805 in words is "two trillion, one hundred fifty-seven billion, eight hundred eighty million, six hundred seventy-five thousand, eight hundred five".