123451681404 has 96 divisors (see below), whose sum is σ = 323178508800. Its totient is φ = 36448358400.

The previous prime is 123451681321. The next prime is 123451681411. The reversal of 123451681404 is 404186154321.

It is a super-2 number, since 2×123451681404² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 479812 + ... + 690740.

It is an arithmetic number, because the mean of its divisors is an integer number (3366442800).

Almost surely, 2^123451681404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123451681404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (161589254400).

123451681404 is an abundant number, since it is smaller than the sum of its proper divisors (199726827396).

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

123451681404 is a wasteful number, since it uses less digits than its factorization.

123451681404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211123 (or 211121 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 39.

The spelling of 123451681404 in words is "one hundred twenty-three billion, four hundred fifty-one million, six hundred eighty-one thousand, four hundred four".