11571638142 has 16 divisors (see below), whose sum is σ = 23247060480. Its totient is φ = 3839915352.

The previous prime is 11571638107. The next prime is 11571638173. The reversal of 11571638142 is 24183617511.

It is a self number, because there is not a number n which added to its sum of digits gives 11571638142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4322892 + ... + 4325567.

It is an arithmetic number, because the mean of its divisors is an integer number (1452941280).

Almost surely, 2^11571638142 is an apocalyptic number.

11571638142 is an abundant number, since it is smaller than the sum of its proper divisors (11675422338).

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

11571638142 is a wasteful number, since it uses less digits than its factorization.

11571638142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8648687.

The product of its digits is 40320, while the sum is 39.

The spelling of 11571638142 in words is "eleven billion, five hundred seventy-one million, six hundred thirty-eight thousand, one hundred forty-two".