3712571627621 has 4 divisors (see below), whose sum is σ = 3773433457644. Its totient is φ = 3651709797600.

The previous prime is 3712571627617. The next prime is 3712571627647. The reversal of 3712571627621 is 1267261752173.

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 1921658565121 + 1790913062500 = 1386239^2 + 1338250^2 .

It is a cyclic number.

It is not a de Polignac number, because 3712571627621 - 2² = 3712571627617 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3712571627621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3712571627651) 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, 30430914920 + ... + 30430915041.

It is an arithmetic number, because the mean of its divisors is an integer number (943358364411).

Almost surely, 2^{3712571627621} is an apocalyptic number.

It is an amenable number.

3712571627621 is a deficient number, since it is larger than the sum of its proper divisors (60861830023).

3712571627621 is an equidigital number, since it uses as much as digits as its factorization.

3712571627621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60861830022.

The product of its digits is 1481760, while the sum is 50.

The spelling of 3712571627621 in words is "three trillion, seven hundred twelve billion, five hundred seventy-one million, six hundred twenty-seven thousand, six hundred twenty-one".