11623790557 has 2 divisors, whose sum is σ = 11623790558. Its totient is φ = 11623790556.

The previous prime is 11623790551. The next prime is 11623790587. The reversal of 11623790557 is 75509732611.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9368110521 + 2255680036 = 96789^2 + 47494^2 .

It is a cyclic number.

It is not a de Polignac number, because 11623790557 - 2²³ = 11615401949 is a prime.

It is a super-2 number, since 2×11623790557² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11623790551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5811895278 + 5811895279.

It is an arithmetic number, because the mean of its divisors is an integer number (5811895279).

Almost surely, 2^11623790557 is an apocalyptic number.

It is an amenable number.

11623790557 is a deficient number, since it is larger than the sum of its proper divisors (1).

11623790557 is an equidigital number, since it uses as much as digits as its factorization.

11623790557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 396900, while the sum is 46.

The spelling of 11623790557 in words is "eleven billion, six hundred twenty-three million, seven hundred ninety thousand, five hundred fifty-seven".