61289641 has 32 divisors (see below), whose sum is σ = 79142400. Its totient is φ = 47190528.

The previous prime is 61289623. The next prime is 61289647. The reversal of 61289641 is 14698216.

It is a happy number.

It is not a de Polignac number, because 61289641 - 2¹¹ = 61287593 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61289641.

It is not an unprimeable number, because it can be changed into a prime (61289647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 133885 + ... + 134341.

It is an arithmetic number, because the mean of its divisors is an integer number (2473200).

Almost surely, 2^61289641 is an apocalyptic number.

It is an amenable number.

61289641 is a deficient number, since it is larger than the sum of its proper divisors (17852759).

61289641 is a wasteful number, since it uses less digits than its factorization.

61289641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 518 (or 504 counting only the distinct ones).

The product of its digits is 20736, while the sum is 37.

The square root of 61289641 is about 7828.7700822032. The cubic root of 61289641 is about 394.2717790394.

The spelling of 61289641 in words is "sixty-one million, two hundred eighty-nine thousand, six hundred forty-one".