1963961071380 has 960 divisors, whose sum is σ = 7776191808000. Its totient is φ = 403092910080.

The previous prime is 1963961071379. The next prime is 1963961071393. The reversal of 1963961071380 is 831701693691.

It is a happy number.

1963961071380 is a `hidden beast` number, since 1 + 9 + 6 + 3 + 9 + 610 + 7 + 13 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 319 ways as a sum of consecutive naturals, for example, 5627395446 + ... + 5627395794.

It is an arithmetic number, because the mean of its divisors is an integer number (8100199800).

Almost surely, 2^{1963961071380} is an apocalyptic number.

1963961071380 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 1963961071380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3888095904000).

1963961071380 is an abundant number, since it is smaller than the sum of its proper divisors (5812230736620).

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

1963961071380 is a wasteful number, since it uses less digits than its factorization.

1963961071380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 814 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 1469664, while the sum is 54.

The spelling of 1963961071380 in words is "one trillion, nine hundred sixty-three billion, nine hundred sixty-one million, seventy-one thousand, three hundred eighty".