1983971448631 has 4 divisors (see below), whose sum is σ = 2037592298632. Its totient is φ = 1930350598632.

The previous prime is 1983971448611. The next prime is 1983971448643. The reversal of 1983971448631 is 1368441793891.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1983971448631 - 2¹⁵ = 1983971415863 is a prime.

It is a super-2 number, since 2×1983971448631² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1983971448611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26810424945 + ... + 26810425018.

It is an arithmetic number, because the mean of its divisors is an integer number (509398074658).

Almost surely, 2^{1983971448631} is an apocalyptic number.

1983971448631 is a deficient number, since it is larger than the sum of its proper divisors (53620850001).

1983971448631 is an equidigital number, since it uses as much as digits as its factorization.

1983971448631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53620850000.

The product of its digits is 31352832, while the sum is 64.

The spelling of 1983971448631 in words is "one trillion, nine hundred eighty-three billion, nine hundred seventy-one million, four hundred forty-eight thousand, six hundred thirty-one".