2157926552447 has 4 divisors (see below), whose sum is σ = 2208110890920. Its totient is φ = 2107742213976.

The previous prime is 2157926552423. The next prime is 2157926552477. The reversal of 2157926552447 is 7442556297512.

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

It is a cyclic number.

It is not a de Polignac number, because 2157926552447 - 2³² = 2153631585151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2157926552477) 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, 25092169172 + ... + 25092169257.

It is an arithmetic number, because the mean of its divisors is an integer number (552027722730).

Almost surely, 2^{2157926552447} is an apocalyptic number.

2157926552447 is a deficient number, since it is larger than the sum of its proper divisors (50184338473).

2157926552447 is an equidigital number, since it uses as much as digits as its factorization.

2157926552447 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50184338472.

The product of its digits is 42336000, while the sum is 59.

The spelling of 2157926552447 in words is "two trillion, one hundred fifty-seven billion, nine hundred twenty-six million, five hundred fifty-two thousand, four hundred forty-seven".