1611978052 has 24 divisors (see below), whose sum is σ = 2917313280. Its totient is φ = 778555680.

The previous prime is 1611978047. The next prime is 1611978073. The reversal of 1611978052 is 2508791161.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1611977996 and 1611978014.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57399 + ... + 80737.

It is an arithmetic number, because the mean of its divisors is an integer number (121554720).

Almost surely, 2^1611978052 is an apocalyptic number.

It is an amenable number.

1611978052 is a deficient number, since it is larger than the sum of its proper divisors (1305335228).

1611978052 is a wasteful number, since it uses less digits than its factorization.

1611978052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23931 (or 23929 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 40.

The square root of 1611978052 is about 40149.4464719005. The cubic root of 1611978052 is about 1172.5185118076.

The spelling of 1611978052 in words is "one billion, six hundred eleven million, nine hundred seventy-eight thousand, fifty-two".