123956788890 has 32 divisors (see below), whose sum is σ = 324541411776. Its totient is φ = 30050130560.

The previous prime is 123956788873. The next prime is 123956788913. The reversal of 123956788890 is 98887659321.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 187812987 + ... + 187813646.

It is an arithmetic number, because the mean of its divisors is an integer number (10141919118).

Almost surely, 2^123956788890 is an apocalyptic number.

123956788890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123956788890 is an abundant number, since it is smaller than the sum of its proper divisors (200584622886).

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

123956788890 is a wasteful number, since it uses less digits than its factorization.

123956788890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 375626654.

The product of its (nonzero) digits is 52254720, while the sum is 66.

The spelling of 123956788890 in words is "one hundred twenty-three billion, nine hundred fifty-six million, seven hundred eighty-eight thousand, eight hundred ninety".