2126723557 has 8 divisors (see below), whose sum is σ = 2430834176. Its totient is φ = 1822686192.

The previous prime is 2126723551. The next prime is 2126723591. The reversal of 2126723557 is 7553276212.

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 2126723557 - 2¹⁵ = 2126690789 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 (2126723551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76963 + ... + 100879.

It is an arithmetic number, because the mean of its divisors is an integer number (303854272).

Almost surely, 2^2126723557 is an apocalyptic number.

It is an amenable number.

2126723557 is a deficient number, since it is larger than the sum of its proper divisors (304110619).

2126723557 is a wasteful number, since it uses less digits than its factorization.

2126723557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36627.

The product of its digits is 176400, while the sum is 40.

The square root of 2126723557 is about 46116.4130977248. The cubic root of 2126723557 is about 1285.9882896623.

Adding to 2126723557 its reverse (7553276212), we get a palindrome (9679999769).

The spelling of 2126723557 in words is "two billion, one hundred twenty-six million, seven hundred twenty-three thousand, five hundred fifty-seven".