61361641 has 12 divisors (see below), whose sum is σ = 68128452. Its totient is φ = 55220000.

The previous prime is 61361639. The next prime is 61361647. The reversal of 61361641 is 14616316.

It can be written as a sum of positive squares in 2 ways, for example, as 57441241 + 3920400 = 7579^2 + 1980^2 .

It is not a de Polignac number, because 61361641 - 2¹ = 61361639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61361647) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9711 + ... + 14731.

It is an arithmetic number, because the mean of its divisors is an integer number (5677371).

Almost surely, 2^61361641 is an apocalyptic number.

It is an amenable number.

61361641 is a deficient number, since it is larger than the sum of its proper divisors (6766811).

61361641 is a wasteful number, since it uses less digits than its factorization.

61361641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5144 (or 5133 counting only the distinct ones).

The product of its digits is 2592, while the sum is 28.

The square root of 61361641 is about 7833.3671559553. The cubic root of 61361641 is about 394.4261088673.

Adding to 61361641 its reverse (14616316), we get a palindrome (75977957).

It can be divided in two parts, 6136 and 1641, that added together give a palindrome (7777).

The spelling of 61361641 in words is "sixty-one million, three hundred sixty-one thousand, six hundred forty-one".