2157875726 has 4 divisors (see below), whose sum is σ = 3236813592. Its totient is φ = 1078937862.

The previous prime is 2157875719. The next prime is 2157875737. The reversal of 2157875726 is 6275787512.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 539468930 + ... + 539468933.

It is an arithmetic number, because the mean of its divisors is an integer number (809203398).

Almost surely, 2^2157875726 is an apocalyptic number.

2157875726 is a deficient number, since it is larger than the sum of its proper divisors (1078937866).

2157875726 is a wasteful number, since it uses less digits than its factorization.

2157875726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078937865.

The product of its digits is 1646400, while the sum is 50.

The square root of 2157875726 is about 46452.9409833220. The cubic root of 2157875726 is about 1292.2369148783.

The spelling of 2157875726 in words is "two billion, one hundred fifty-seven million, eight hundred seventy-five thousand, seven hundred twenty-six".