11721642026457 has 16 divisors (see below), whose sum is σ = 17126117019648. Its totient is φ = 7072168849680.

The previous prime is 11721642026453. The next prime is 11721642026477. The reversal of 11721642026457 is 75462024612711.

It is not a de Polignac number, because 11721642026457 - 2² = 11721642026453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11721642026453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 796408053 + ... + 796422770.

It is an arithmetic number, because the mean of its divisors is an integer number (1070382313728).

Almost surely, 2^{11721642026457} is an apocalyptic number.

It is an amenable number.

11721642026457 is a deficient number, since it is larger than the sum of its proper divisors (5404474993191).

11721642026457 is a wasteful number, since it uses less digits than its factorization.

11721642026457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592831060.

The product of its (nonzero) digits is 1128960, while the sum is 48.

The spelling of 11721642026457 in words is "eleven trillion, seven hundred twenty-one billion, six hundred forty-two million, twenty-six thousand, four hundred fifty-seven".