6161140421 has 4 divisors (see below), whose sum is σ = 6162586572. Its totient is φ = 6159694272.

The previous prime is 6161140411. The next prime is 6161140423. The reversal of 6161140421 is 1240411616.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3137680225 + 3023460196 = 56015^2 + 54986^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6161140421 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 (6161140423) 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, 716666 + ... + 725211.

It is an arithmetic number, because the mean of its divisors is an integer number (1540646643).

Almost surely, 2^6161140421 is an apocalyptic number.

It is an amenable number.

6161140421 is a deficient number, since it is larger than the sum of its proper divisors (1446151).

6161140421 is a wasteful number, since it uses less digits than its factorization.

6161140421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1446150.

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 6161140421 is about 78492.9322996663. The cubic root of 6161140421 is about 1833.2444084214.

The spelling of 6161140421 in words is "six billion, one hundred sixty-one million, one hundred forty thousand, four hundred twenty-one".