537621657401 has 4 divisors (see below), whose sum is σ = 537623494692. Its totient is φ = 537619820112.

The previous prime is 537621657343. The next prime is 537621657413. The reversal of 537621657401 is 104756126735.

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

It can be written as a sum of positive squares in 2 ways, for example, as 390748759801 + 146872897600 = 625099^2 + 383240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-537621657401 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (537621057401) 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, 370826 + ... + 1101251.

It is an arithmetic number, because the mean of its divisors is an integer number (134405873673).

Almost surely, 2^537621657401 is an apocalyptic number.

It is an amenable number.

537621657401 is a deficient number, since it is larger than the sum of its proper divisors (1837291).

537621657401 is a wasteful number, since it uses less digits than its factorization.

537621657401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1837290.

The product of its (nonzero) digits is 1058400, while the sum is 47.

The spelling of 537621657401 in words is "five hundred thirty-seven billion, six hundred twenty-one million, six hundred fifty-seven thousand, four hundred one".