1361999249919 has 48 divisors (see below), whose sum is σ = 2463305105664. Its totient is φ = 704495376000.

The previous prime is 1361999249899. The next prime is 1361999249927. The reversal of 1361999249919 is 9199429991631.

1361999249919 is a `hidden beast` number, since 1 + 36 + 1 + 9 + 9 + 92 + 499 + 19 = 666.

It is not a de Polignac number, because 1361999249919 - 2⁷ = 1361999249791 is a prime.

It is a super-2 number, since 2×1361999249919² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1361999249999) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4056057 + ... + 4378994.

It is an arithmetic number, because the mean of its divisors is an integer number (51318856368).

Almost surely, 2^{1361999249919} is an apocalyptic number.

1361999249919 is a deficient number, since it is larger than the sum of its proper divisors (1101305855745).

1361999249919 is a wasteful number, since it uses less digits than its factorization.

1361999249919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8435308 (or 8435305 counting only the distinct ones).

The product of its digits is 76527504, while the sum is 72.

The spelling of 1361999249919 in words is "one trillion, three hundred sixty-one billion, nine hundred ninety-nine million, two hundred forty-nine thousand, nine hundred nineteen".