11172451438 has 8 divisors (see below), whose sum is σ = 16915300632. Its totient is φ = 5534017896.

The previous prime is 11172451387. The next prime is 11172451471. The reversal of 11172451438 is 83415427111.

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

It is a super-2 number, since 2×11172451438² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11172451397 and 11172451406.

It is a congruent number.

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, 26103645 + ... + 26104072.

It is an arithmetic number, because the mean of its divisors is an integer number (2114412579).

Almost surely, 2^11172451438 is an apocalyptic number.

11172451438 is a deficient number, since it is larger than the sum of its proper divisors (5742849194).

11172451438 is a wasteful number, since it uses less digits than its factorization.

11172451438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52207826.

The product of its digits is 26880, while the sum is 37.

Adding to 11172451438 its reverse (83415427111), we get a palindrome (94587878549).

The spelling of 11172451438 in words is "eleven billion, one hundred seventy-two million, four hundred fifty-one thousand, four hundred thirty-eight".