61140224661 has 8 divisors (see below), whose sum is σ = 84331344480. Its totient is φ = 39354627312.

The previous prime is 61140224657. The next prime is 61140224671. The reversal of 61140224661 is 16642204116.

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

It is not a de Polignac number, because 61140224661 - 2² = 61140224657 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61140224671) 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, 351380515 + ... + 351380688.

It is an arithmetic number, because the mean of its divisors is an integer number (10541418060).

Almost surely, 2^61140224661 is an apocalyptic number.

It is an amenable number.

61140224661 is a deficient number, since it is larger than the sum of its proper divisors (23191119819).

61140224661 is a wasteful number, since it uses less digits than its factorization.

61140224661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702761235.

The product of its (nonzero) digits is 13824, while the sum is 33.

Adding to 61140224661 its reverse (16642204116), we get a palindrome (77782428777).

The spelling of 61140224661 in words is "sixty-one billion, one hundred forty million, two hundred twenty-four thousand, six hundred sixty-one".