18376447779400 has 192 divisors, whose sum is σ = 45348997478400. Its totient is φ = 6916725504000.

The previous prime is 18376447779367. The next prime is 18376447779461. The reversal of 18376447779400 is 497774467381.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 25283065 + ... + 25999735.

It is an arithmetic number, because the mean of its divisors is an integer number (236192695200).

Almost surely, 2^{18376447779400} is an apocalyptic number.

18376447779400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18376447779400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22674498739200).

18376447779400 is an abundant number, since it is smaller than the sum of its proper divisors (26972549699000).

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

18376447779400 is a wasteful number, since it uses less digits than its factorization.

18376447779400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 716840 (or 716831 counting only the distinct ones).

The product of its (nonzero) digits is 199148544, while the sum is 67.

The spelling of 18376447779400 in words is "eighteen trillion, three hundred seventy-six billion, four hundred forty-seven million, seven hundred seventy-nine thousand, four hundred".