61550577736 has 16 divisors (see below), whose sum is σ = 118526450940. Its totient is φ = 29943524160.

The previous prime is 61550577731. The next prime is 61550577769. The reversal of 61550577736 is 63777505516.

It can be written as a sum of positive squares in 2 ways, for example, as 60167184100 + 1383393636 = 245290^2 + 37194^2 .

It is not an unprimeable number, because it can be changed into a prime (61550577731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103970275 + ... + 103970866.

Almost surely, 2^61550577736 is an apocalyptic number.

It is an amenable number.

61550577736 is a deficient number, since it is larger than the sum of its proper divisors (56975873204).

61550577736 is a wasteful number, since it uses less digits than its factorization.

61550577736 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207941184 (or 207941180 counting only the distinct ones).

The product of its (nonzero) digits is 4630500, while the sum is 52.

The spelling of 61550577736 in words is "sixty-one billion, five hundred fifty million, five hundred seventy-seven thousand, seven hundred thirty-six".