61649309445423 has 32 divisors (see below), whose sum is σ = 98533555021824. Its totient is φ = 33546785962752.

The previous prime is 61649309445313. The next prime is 61649309445463. The reversal of 61649309445423 is 32454490394616.

It is not a de Polignac number, because 61649309445423 - 2¹⁴ = 61649309429039 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61649309445463) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 844035190 + ... + 844108227.

It is an arithmetic number, because the mean of its divisors is an integer number (3079173594432).

Almost surely, 2^{61649309445423} is an apocalyptic number.

61649309445423 is a deficient number, since it is larger than the sum of its proper divisors (36884245576401).

61649309445423 is a wasteful number, since it uses less digits than its factorization.

61649309445423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1688143511.

The product of its (nonzero) digits is 67184640, while the sum is 60.

The spelling of 61649309445423 in words is "sixty-one trillion, six hundred forty-nine billion, three hundred nine million, four hundred forty-five thousand, four hundred twenty-three".