61649411 has 4 divisors (see below), whose sum is σ = 61969032. Its totient is φ = 61329792.

The previous prime is 61649267. The next prime is 61649431. The reversal of 61649411 is 11494616.

It is a happy number.

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 61649411 - 2¹⁰ = 61648387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61649431) 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, 159521 + ... + 159906.

It is an arithmetic number, because the mean of its divisors is an integer number (15492258).

Almost surely, 2^61649411 is an apocalyptic number.

61649411 is a deficient number, since it is larger than the sum of its proper divisors (319621).

61649411 is a wasteful number, since it uses less digits than its factorization.

61649411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319620.

The product of its digits is 5184, while the sum is 32.

The square root of 61649411 is about 7851.7138893365. The cubic root of 61649411 is about 395.0417324919.

The spelling of 61649411 in words is "sixty-one million, six hundred forty-nine thousand, four hundred eleven".