1138815501 has 8 divisors (see below), whose sum is σ = 1533454944. Its totient is φ = 751693200.

The previous prime is 1138815487. The next prime is 1138815553. The reversal of 1138815501 is 1055188311.

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

It is not a de Polignac number, because 1138815501 - 2⁷ = 1138815373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138816501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1878931 + ... + 1879536.

It is an arithmetic number, because the mean of its divisors is an integer number (191681868).

Almost surely, 2^1138815501 is an apocalyptic number.

It is an amenable number.

1138815501 is a deficient number, since it is larger than the sum of its proper divisors (394639443).

1138815501 is a wasteful number, since it uses less digits than its factorization.

1138815501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3758571.

The product of its (nonzero) digits is 4800, while the sum is 33.

The square root of 1138815501 is about 33746.3405571626. The cubic root of 1138815501 is about 1044.2819945141.

The spelling of 1138815501 in words is "one billion, one hundred thirty-eight million, eight hundred fifteen thousand, five hundred one".