61544634707 has 16 divisors (see below), whose sum is σ = 66015559680. Its totient is φ = 57247495200.

The previous prime is 61544634703. The next prime is 61544634713. The reversal of 61544634707 is 70743644516.

It is a cyclic number.

It is not a de Polignac number, because 61544634707 - 2² = 61544634703 is a prime.

It is a super-2 number, since 2×61544634707² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61544634703) 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 15 ways as a sum of consecutive naturals, for example, 46982 + ... + 353972.

It is an arithmetic number, because the mean of its divisors is an integer number (4125972480).

Almost surely, 2^61544634707 is an apocalyptic number.

61544634707 is a deficient number, since it is larger than the sum of its proper divisors (4470924973).

61544634707 is a wasteful number, since it uses less digits than its factorization.

61544634707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307274.

The product of its (nonzero) digits is 1693440, while the sum is 47.

The spelling of 61544634707 in words is "sixty-one billion, five hundred forty-four million, six hundred thirty-four thousand, seven hundred seven".