3621520137281 has 4 divisors (see below), whose sum is σ = 3632461286064. Its totient is φ = 3610578988500.

The previous prime is 3621520137271. The next prime is 3621520137283. The reversal of 3621520137281 is 1827310251263.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 3621520137281 - 2⁶ = 3621520137217 is a prime.

It is a super-2 number, since 2×3621520137281² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3621520137283) 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, 5470573895 + ... + 5470574556.

It is an arithmetic number, because the mean of its divisors is an integer number (908115321516).

Almost surely, 2^{3621520137281} is an apocalyptic number.

It is an amenable number.

3621520137281 is a deficient number, since it is larger than the sum of its proper divisors (10941148783).

3621520137281 is a wasteful number, since it uses less digits than its factorization.

3621520137281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10941148782.

The product of its (nonzero) digits is 120960, while the sum is 41.

The spelling of 3621520137281 in words is "three trillion, six hundred twenty-one billion, five hundred twenty million, one hundred thirty-seven thousand, two hundred eighty-one".