10156115621 has 4 divisors (see below), whose sum is σ = 10161443232. Its totient is φ = 10150788012.

The previous prime is 10156115611. The next prime is 10156115687. The reversal of 10156115621 is 12651165101.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12651165101 = 241 ⋅52494461.

It is a cyclic number.

It is not a de Polignac number, because 10156115621 - 2¹⁰ = 10156114597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10156115611) 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, 2660945 + ... + 2664758.

It is an arithmetic number, because the mean of its divisors is an integer number (2540360808).

Almost surely, 2^10156115621 is an apocalyptic number.

It is an amenable number.

10156115621 is a deficient number, since it is larger than the sum of its proper divisors (5327611).

10156115621 is an equidigital number, since it uses as much as digits as its factorization.

10156115621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5327610.

The product of its (nonzero) digits is 1800, while the sum is 29.

The spelling of 10156115621 in words is "ten billion, one hundred fifty-six million, one hundred fifteen thousand, six hundred twenty-one".