123581879990 has 8 divisors (see below), whose sum is σ = 222447384000. Its totient is φ = 49432751992.

The previous prime is 123581879969. The next prime is 123581880011. The reversal of 123581879990 is 99978185321.

It is an interprime number because it is at equal distance from previous prime (123581879969) and next prime (123581880011).

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

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, 6179093990 + ... + 6179094009.

It is an arithmetic number, because the mean of its divisors is an integer number (27805923000).

Almost surely, 2^123581879990 is an apocalyptic number.

123581879990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123581879990 is a deficient number, since it is larger than the sum of its proper divisors (98865504010).

123581879990 is a wasteful number, since it uses less digits than its factorization.

123581879990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12358188006.

The product of its (nonzero) digits is 9797760, while the sum is 62.

The spelling of 123581879990 in words is "one hundred twenty-three billion, five hundred eighty-one million, eight hundred seventy-nine thousand, nine hundred ninety".