2061561479 has 4 divisors (see below), whose sum is σ = 2062865376. Its totient is φ = 2060257584.

The previous prime is 2061561431. The next prime is 2061561529. The reversal of 2061561479 is 9741651602.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2061561479 - 2²⁰ = 2060512903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2061561179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 649574 + ... + 652739.

It is an arithmetic number, because the mean of its divisors is an integer number (515716344).

Almost surely, 2^2061561479 is an apocalyptic number.

2061561479 is a deficient number, since it is larger than the sum of its proper divisors (1303897).

2061561479 is a wasteful number, since it uses less digits than its factorization.

2061561479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1303896.

The product of its (nonzero) digits is 90720, while the sum is 41.

The square root of 2061561479 is about 45404.4213595989. The cubic root of 2061561479 is about 1272.7177377995.

The spelling of 2061561479 in words is "two billion, sixty-one million, five hundred sixty-one thousand, four hundred seventy-nine".