12485909890 has 16 divisors (see below), whose sum is σ = 22500695808. Its totient is φ = 4988573296.

The previous prime is 12485909833. The next prime is 12485909923. The reversal of 12485909890 is 9890958421.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 714772 + ... + 732031.

It is an arithmetic number, because the mean of its divisors is an integer number (1406293488).

Almost surely, 2^12485909890 is an apocalyptic number.

12485909890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12485909890 is a deficient number, since it is larger than the sum of its proper divisors (10014785918).

12485909890 is a wasteful number, since it uses less digits than its factorization.

12485909890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1447673.

The product of its (nonzero) digits is 1866240, while the sum is 55.

The spelling of 12485909890 in words is "twelve billion, four hundred eighty-five million, nine hundred nine thousand, eight hundred ninety".