11915428697 has 2 divisors, whose sum is σ = 11915428698. Its totient is φ = 11915428696.

The previous prime is 11915428667. The next prime is 11915428703. The reversal of 11915428697 is 79682451911.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7260914521 + 4654514176 = 85211^2 + 68224^2 .

It is a cyclic number.

It is not a de Polignac number, because 11915428697 - 2⁶ = 11915428633 is a prime.

It is a super-2 number, since 2×11915428697² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11915428667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5957714348 + 5957714349.

It is an arithmetic number, because the mean of its divisors is an integer number (5957714349).

Almost surely, 2^11915428697 is an apocalyptic number.

It is an amenable number.

11915428697 is a deficient number, since it is larger than the sum of its proper divisors (1).

11915428697 is an equidigital number, since it uses as much as digits as its factorization.

11915428697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1088640, while the sum is 53.

The spelling of 11915428697 in words is "eleven billion, nine hundred fifteen million, four hundred twenty-eight thousand, six hundred ninety-seven".