61217641 has 8 divisors (see below), whose sum is σ = 62826624. Its totient is φ = 59621520.

The previous prime is 61217621. The next prime is 61217659. The reversal of 61217641 is 14671216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 61217641 - 2¹⁵ = 61184873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61217621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6831 + ... + 13003.

It is an arithmetic number, because the mean of its divisors is an integer number (7853328).

Almost surely, 2^61217641 is an apocalyptic number.

It is an amenable number.

61217641 is a deficient number, since it is larger than the sum of its proper divisors (1608983).

61217641 is a wasteful number, since it uses less digits than its factorization.

61217641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6431.

The product of its digits is 2016, while the sum is 28.

The square root of 61217641 is about 7824.1703074511. The cubic root of 61217641 is about 394.1173282981.

Adding to 61217641 its reverse (14671216), we get a palindrome (75888857).

The spelling of 61217641 in words is "sixty-one million, two hundred seventeen thousand, six hundred forty-one".