1601913461 has 4 divisors (see below), whose sum is σ = 1601993772. Its totient is φ = 1601833152.

The previous prime is 1601913433. The next prime is 1601913493. The reversal of 1601913461 is 1643191061.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 1643191061 = 1093 ⋅1503377.

It can be written as a sum of positive squares in 2 ways, for example, as 1547242225 + 54671236 = 39335^2 + 7394^2 .

It is a cyclic number.

It is not a de Polignac number, because 1601913461 - 2²⁶ = 1534804597 is a prime.

It is a super-2 number, since 2×1601913461² = 5132253473065997042, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1601913421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15215 + ... + 58611.

It is an arithmetic number, because the mean of its divisors is an integer number (400498443).

Almost surely, 2^1601913461 is an apocalyptic number.

It is an amenable number.

1601913461 is a deficient number, since it is larger than the sum of its proper divisors (80311).

1601913461 is an equidigital number, since it uses as much as digits as its factorization.

1601913461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80310.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 1601913461 is about 40023.9111157318. The cubic root of 1601913461 is about 1170.0731590360.

The spelling of 1601913461 in words is "one billion, six hundred one million, nine hundred thirteen thousand, four hundred sixty-one".