1611963243 has 12 divisors (see below), whose sum is σ = 2540063448. Its totient is φ = 976947360.

The previous prime is 1611963229. The next prime is 1611963259. The reversal of 1611963243 is 3423691161.

1611963243 is a `hidden beast` number, since 1 + 6 + 1 + 19 + 632 + 4 + 3 = 666.

It is not a de Polignac number, because 1611963243 - 2⁸ = 1611962987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1611963198 and 1611963207.

It is not an unprimeable number, because it can be changed into a prime (1611963293) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8141130 + ... + 8141327.

It is an arithmetic number, because the mean of its divisors is an integer number (211671954).

Almost surely, 2^1611963243 is an apocalyptic number.

1611963243 is a deficient number, since it is larger than the sum of its proper divisors (928100205).

1611963243 is a wasteful number, since it uses less digits than its factorization.

1611963243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16282474 (or 16282471 counting only the distinct ones).

The product of its digits is 23328, while the sum is 36.

The square root of 1611963243 is about 40149.2620480128. The cubic root of 1611963243 is about 1172.5149212128.

The spelling of 1611963243 in words is "one billion, six hundred eleven million, nine hundred sixty-three thousand, two hundred forty-three".