111631690538 has 4 divisors (see below), whose sum is σ = 167447535810. Its totient is φ = 55815845268.

The previous prime is 111631690481. The next prime is 111631690559. The reversal of 111631690538 is 835096136111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 111337670929 + 294019609 = 333673^2 + 17147^2 .

It is a super-3 number, since 3×111631690538³ (a number of 34 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27907922633 + ... + 27907922636.

Almost surely, 2^111631690538 is an apocalyptic number.

111631690538 is a deficient number, since it is larger than the sum of its proper divisors (55815845272).

111631690538 is an equidigital number, since it uses as much as digits as its factorization.

111631690538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55815845271.

The product of its (nonzero) digits is 116640, while the sum is 44.

The spelling of 111631690538 in words is "one hundred eleven billion, six hundred thirty-one million, six hundred ninety thousand, five hundred thirty-eight".