11257686642 has 32 divisors (see below), whose sum is σ = 23249963520. Its totient is φ = 3630216960.

The previous prime is 11257686641. The next prime is 11257686653. The reversal of 11257686642 is 24668675211.

It is a junction number, because it is equal to n+sod(n) for n = 11257686591 and 11257686600.

It is not an unprimeable number, because it can be changed into a prime (11257686641) 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, 607084 + ... + 625352.

It is an arithmetic number, because the mean of its divisors is an integer number (726561360).

Almost surely, 2^11257686642 is an apocalyptic number.

11257686642 is an abundant number, since it is smaller than the sum of its proper divisors (11992276878).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11257686642 is a wasteful number, since it uses less digits than its factorization.

11257686642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21618.

The product of its digits is 967680, while the sum is 48.

The spelling of 11257686642 in words is "eleven billion, two hundred fifty-seven million, six hundred eighty-six thousand, six hundred forty-two".