9181873641 has 8 divisors (see below), whose sum is σ = 12243513184. Its totient is φ = 6120741600.

The previous prime is 9181873609. The next prime is 9181873661. The reversal of 9181873641 is 1463781819.

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

It is not a de Polignac number, because 9181873641 - 2⁵ = 9181873609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9181873661) 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, 82435 + ... + 158616.

It is an arithmetic number, because the mean of its divisors is an integer number (1530439148).

Almost surely, 2^9181873641 is an apocalyptic number.

It is an amenable number.

9181873641 is a deficient number, since it is larger than the sum of its proper divisors (3061639543).

9181873641 is a wasteful number, since it uses less digits than its factorization.

9181873641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 253751.

The product of its digits is 290304, while the sum is 48.

The square root of 9181873641 is about 95822.0936997309. The cubic root of 9181873641 is about 2094.0020568594.

The spelling of 9181873641 in words is "nine billion, one hundred eighty-one million, eight hundred seventy-three thousand, six hundred forty-one".