1611890452 has 12 divisors (see below), whose sum is σ = 2835425236. Its totient is φ = 801768960.

The previous prime is 1611890429. The next prime is 1611890471. The reversal of 1611890452 is 2540981161.

It can be written as a sum of positive squares in 2 ways, for example, as 146991376 + 1464899076 = 12124^2 + 38274^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1043199 + ... + 1044742.

Almost surely, 2^1611890452 is an apocalyptic number.

It is an amenable number.

1611890452 is a deficient number, since it is larger than the sum of its proper divisors (1223534784).

1611890452 is a wasteful number, since it uses less digits than its factorization.

1611890452 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2088138 (or 2088136 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The square root of 1611890452 is about 40148.3555329480. The cubic root of 1611890452 is about 1172.4972719646.

The spelling of 1611890452 in words is "one billion, six hundred eleven million, eight hundred ninety thousand, four hundred fifty-two".