11425151621 has 4 divisors (see below), whose sum is σ = 12304009452. Its totient is φ = 10546293792.

The previous prime is 11425151567. The next prime is 11425151627. The reversal of 11425151621 is 12615152411.

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 1148260996 + 10276890625 = 33886^2 + 101375^2 .

It is a cyclic number.

It is not a de Polignac number, because 11425151621 - 2¹⁴ = 11425135237 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 (11425151627) 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, 439428896 + ... + 439428921.

It is an arithmetic number, because the mean of its divisors is an integer number (3076002363).

Almost surely, 2^11425151621 is an apocalyptic number.

It is an amenable number.

11425151621 is a deficient number, since it is larger than the sum of its proper divisors (878857831).

11425151621 is an equidigital number, since it uses as much as digits as its factorization.

11425151621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878857830.

The product of its digits is 2400, while the sum is 29.

The spelling of 11425151621 in words is "eleven billion, four hundred twenty-five million, one hundred fifty-one thousand, six hundred twenty-one".