1961786944432 has 80 divisors (see below), whose sum is σ = 4417672901632. Its totient is φ = 826513839360.

The previous prime is 1961786944423. The next prime is 1961786944441. The reversal of 1961786944432 is 2344496871691.

It is an interprime number because it is at equal distance from previous prime (1961786944423) and next prime (1961786944441).

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, 12100933 + ... + 12261979.

Almost surely, 2^{1961786944432} 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 1961786944432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2208836450816).

1961786944432 is an abundant number, since it is smaller than the sum of its proper divisors (2455885957200).

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

1961786944432 is a wasteful number, since it uses less digits than its factorization.

1961786944432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162906 (or 162900 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 64.

The spelling of 1961786944432 in words is "one trillion, nine hundred sixty-one billion, seven hundred eighty-six million, nine hundred forty-four thousand, four hundred thirty-two".