193681449780 has 192 divisors, whose sum is σ = 667708489728. Its totient is φ = 40849205760.

The previous prime is 193681449779. The next prime is 193681449833. The reversal of 193681449780 is 87944186391.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 19776685 + ... + 19786475.

It is an arithmetic number, because the mean of its divisors is an integer number (3477648384).

Almost surely, 2^193681449780 is an apocalyptic number.

193681449780 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 193681449780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (333854244864).

193681449780 is an abundant number, since it is smaller than the sum of its proper divisors (474027039948).

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

193681449780 is a wasteful number, since it uses less digits than its factorization.

193681449780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13446 (or 13444 counting only the distinct ones).

The product of its (nonzero) digits is 10450944, while the sum is 60.

The spelling of 193681449780 in words is "one hundred ninety-three billion, six hundred eighty-one million, four hundred forty-nine thousand, seven hundred eighty".