61211539682 has 16 divisors (see below), whose sum is σ = 91960173240. Its totient is φ = 30558187008.

The previous prime is 61211539673. The next prime is 61211539759. The reversal of 61211539682 is 28693511216.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 30140779321 + 31070760361 = 173611^2 + 176269^2 .

It is a super-2 number, since 2×61211539682² (a number of 22 digits) contains 22 as substring.

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 in 7 ways as a sum of consecutive naturals, for example, 3720338 + ... + 3736754.

Almost surely, 2^61211539682 is an apocalyptic number.

61211539682 is a deficient number, since it is larger than the sum of its proper divisors (30748633558).

61211539682 is a wasteful number, since it uses less digits than its factorization.

61211539682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19205.

The product of its digits is 155520, while the sum is 44.

The spelling of 61211539682 in words is "sixty-one billion, two hundred eleven million, five hundred thirty-nine thousand, six hundred eighty-two".