1981250654416 has 40 divisors (see below), whose sum is σ = 4224702262464. Its totient is φ = 892598837760.

The previous prime is 1981250654393. The next prime is 1981250654419. The reversal of 1981250654416 is 6144560521891.

It is a super-3 number, since 3×1981250654416³ (a number of 38 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (52) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1981250654419) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49790316 + ... + 49830091.

Almost surely, 2^{1981250654416} is an apocalyptic number.

1981250654416 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1981250654416 is an abundant number, since it is smaller than the sum of its proper divisors (2243451608048).

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

1981250654416 is a wasteful number, since it uses less digits than its factorization.

1981250654416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99620539 (or 99620533 counting only the distinct ones).

The product of its (nonzero) digits is 2073600, while the sum is 52.

The spelling of 1981250654416 in words is "one trillion, nine hundred eighty-one billion, two hundred fifty million, six hundred fifty-four thousand, four hundred sixteen".