541721251656664 has 16 divisors (see below), whose sum is σ = 1016119368256320. Its totient is φ = 270756086788320.

The previous prime is 541721251656547. The next prime is 541721251656667. The reversal of 541721251656664 is 466656152127145.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (541721251656667) 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, 13067357979 + ... + 13067399434.

It is an arithmetic number, because the mean of its divisors is an integer number (63507460516020).

Almost surely, 2^{541721251656664} is an apocalyptic number.

It is an amenable number.

541721251656664 is a deficient number, since it is larger than the sum of its proper divisors (474398116599656).

541721251656664 is a wasteful number, since it uses less digits than its factorization.

541721251656664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26134760010 (or 26134760006 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 61.

The spelling of 541721251656664 in words is "five hundred forty-one trillion, seven hundred twenty-one billion, two hundred fifty-one million, six hundred fifty-six thousand, six hundred sixty-four".