19791780901344 has 48 divisors (see below), whose sum is σ = 57726027631440. Its totient is φ = 6597260300160.

The previous prime is 19791780901313. The next prime is 19791780901363. The reversal of 19791780901344 is 44310908719791.

19791780901344 is a `hidden beast` number, since 197 + 9 + 17 + 8 + 0 + 90 + 1 + 344 = 666.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×19791780901344² (a number of 27 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 7 ways as a sum of consecutive naturals, for example, 11453576047 + ... + 11453577774.

It is an arithmetic number, because the mean of its divisors is an integer number (1202625575655).

Almost surely, 2^{19791780901344} is an apocalyptic number.

It is an amenable number.

19791780901344 is an abundant number, since it is smaller than the sum of its proper divisors (37934246730096).

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

19791780901344 is a wasteful number, since it uses less digits than its factorization.

19791780901344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22907153840 (or 22907153826 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 63.

The spelling of 19791780901344 in words is "nineteen trillion, seven hundred ninety-one billion, seven hundred eighty million, nine hundred one thousand, three hundred forty-four".