12456667890 has 64 divisors (see below), whose sum is σ = 35171781120. Its totient is φ = 3126378240.

The previous prime is 12456667877. The next prime is 12456667933. The reversal of 12456667890 is 9876665421.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1352346 + ... + 1361525.

It is an arithmetic number, because the mean of its divisors is an integer number (549559080).

Almost surely, 2^12456667890 is an apocalyptic number.

12456667890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12456667890 is an abundant number, since it is smaller than the sum of its proper divisors (22715113230).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12456667890 is a wasteful number, since it uses less digits than its factorization.

12456667890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2713904 (or 2713898 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 12456667890 in words is "twelve billion, four hundred fifty-six million, six hundred sixty-seven thousand, eight hundred ninety".