61636212746 has 4 divisors (see below), whose sum is σ = 92454319122. Its totient is φ = 30818106372.

The previous prime is 61636212739. The next prime is 61636212811. The reversal of 61636212746 is 64721263616.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 46188457225 + 15447755521 = 214915^2 + 124289^2 .

It is a junction number, because it is equal to n+sod(n) for n = 61636212697 and 61636212706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15409053185 + ... + 15409053188.

Almost surely, 2^61636212746 is an apocalyptic number.

61636212746 is a deficient number, since it is larger than the sum of its proper divisors (30818106376).

61636212746 is a wasteful number, since it uses less digits than its factorization.

61636212746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30818106375.

The product of its digits is 435456, while the sum is 44.

The spelling of 61636212746 in words is "sixty-one billion, six hundred thirty-six million, two hundred twelve thousand, seven hundred forty-six".