1611993941 has 8 divisors (see below), whose sum is σ = 1707329664. Its totient is φ = 1516715200.

The previous prime is 1611993919. The next prime is 1611993961. The reversal of 1611993941 is 1493991161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1611993941 - 2¹⁰ = 1611992917 is a prime.

It is a super-2 number, since 2×1611993941² = 5197048931641422962, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1611993892 and 1611993901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1611993961) 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, 53156 + ... + 77778.

It is an arithmetic number, because the mean of its divisors is an integer number (213416208).

Almost surely, 2^1611993941 is an apocalyptic number.

It is an amenable number.

1611993941 is a deficient number, since it is larger than the sum of its proper divisors (95335723).

1611993941 is a wasteful number, since it uses less digits than its factorization.

1611993941 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28491.

The product of its digits is 52488, while the sum is 44.

The square root of 1611993941 is about 40149.6443446265. The cubic root of 1611993941 is about 1172.5223642350.

The spelling of 1611993941 in words is "one billion, six hundred eleven million, nine hundred ninety-three thousand, nine hundred forty-one".