11215565457 has 16 divisors (see below), whose sum is σ = 15512743680. Its totient is φ = 7202332800.

The previous prime is 11215565381. The next prime is 11215565489. The reversal of 11215565457 is 75456551211.

It is a happy number.

It is not a de Polignac number, because 11215565457 - 2⁸ = 11215565201 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11215560457) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 567394 + ... + 586827.

It is an arithmetic number, because the mean of its divisors is an integer number (969546480).

Almost surely, 2^11215565457 is an apocalyptic number.

It is an amenable number.

11215565457 is a deficient number, since it is larger than the sum of its proper divisors (4297178223).

11215565457 is a wasteful number, since it uses less digits than its factorization.

11215565457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1154344.

The product of its digits is 210000, while the sum is 42.

The spelling of 11215565457 in words is "eleven billion, two hundred fifteen million, five hundred sixty-five thousand, four hundred fifty-seven".