11621414957 has 4 divisors (see below), whose sum is σ = 11688590940. Its totient is φ = 11554238976.

The previous prime is 11621414951. The next prime is 11621414969. The reversal of 11621414957 is 75941412611.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75941412611 = 89 ⋅853274299.

It can be written as a sum of positive squares in 2 ways, for example, as 9914981476 + 1706433481 = 99574^2 + 41309^2 .

It is a cyclic number.

It is not a de Polignac number, because 11621414957 - 2⁴ = 11621414941 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 (11621414951) 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, 33587732 + ... + 33588077.

It is an arithmetic number, because the mean of its divisors is an integer number (2922147735).

Almost surely, 2^11621414957 is an apocalyptic number.

It is an amenable number.

11621414957 is a deficient number, since it is larger than the sum of its proper divisors (67175983).

11621414957 is an equidigital number, since it uses as much as digits as its factorization.

11621414957 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67175982.

The product of its digits is 60480, while the sum is 41.

The spelling of 11621414957 in words is "eleven billion, six hundred twenty-one million, four hundred fourteen thousand, nine hundred fifty-seven".