61441621 has 8 divisors (see below), whose sum is σ = 65225304. Its totient is φ = 57676800.

The previous prime is 61441607. The next prime is 61441637. The reversal of 61441621 is 12614416.

61441621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 35533521 + 25908100 = 5961^2 + 5090^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61441621 is a prime.

It is a super-2 number, since 2×61441621² = 7550145582215282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61441651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2311 + ... + 11323.

It is an arithmetic number, because the mean of its divisors is an integer number (8153163).

Almost surely, 2^61441621 is an apocalyptic number.

It is an amenable number.

61441621 is a deficient number, since it is larger than the sum of its proper divisors (3783683).

61441621 is a wasteful number, since it uses less digits than its factorization.

61441621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9431.

The product of its digits is 1152, while the sum is 25.

The square root of 61441621 is about 7838.4705778615. The cubic root of 61441621 is about 394.5974021139.

The spelling of 61441621 in words is "sixty-one million, four hundred forty-one thousand, six hundred twenty-one".