11515381442 has 8 divisors (see below), whose sum is σ = 17694366732. Its totient is φ = 5617259200.

The previous prime is 11515381439. The next prime is 11515381453. The reversal of 11515381442 is 24418351511.

It can be written as a sum of positive squares in 2 ways, for example, as 9749785081 + 1765596361 = 98741^2 + 42019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70215659 + ... + 70215822.

Almost surely, 2^11515381442 is an apocalyptic number.

11515381442 is a deficient number, since it is larger than the sum of its proper divisors (6178985290).

11515381442 is a wasteful number, since it uses less digits than its factorization.

11515381442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140431524.

The product of its digits is 19200, while the sum is 35.

The spelling of 11515381442 in words is "eleven billion, five hundred fifteen million, three hundred eighty-one thousand, four hundred forty-two".