61532165641 has 4 divisors (see below), whose sum is σ = 61766128512. Its totient is φ = 61298202772.

The previous prime is 61532165609. The next prime is 61532165677. The reversal of 61532165641 is 14656123516.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 61532165641 - 2⁵ = 61532165609 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61532165594 and 61532165603.

It is not an unprimeable number, because it can be changed into a prime (61532165441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 116981041 + ... + 116981566.

It is an arithmetic number, because the mean of its divisors is an integer number (15441532128).

Almost surely, 2^61532165641 is an apocalyptic number.

It is an amenable number.

61532165641 is a deficient number, since it is larger than the sum of its proper divisors (233962871).

61532165641 is a wasteful number, since it uses less digits than its factorization.

61532165641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233962870.

The product of its digits is 129600, while the sum is 40.

The spelling of 61532165641 in words is "sixty-one billion, five hundred thirty-two million, one hundred sixty-five thousand, six hundred forty-one".