61115106100 has 18 divisors (see below), whose sum is σ = 132619780454. Its totient is φ = 24446042400.

The previous prime is 61115106061. The next prime is 61115106113. The reversal of 61115106100 is 160151116.

It can be written as a sum of positive squares in 3 ways, for example, as 16067590564 + 45047515536 = 126758^2 + 212244^2 .

It is a super-2 number, since 2×61115106100² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 305575431 + ... + 305575630.

Almost surely, 2^61115106100 is an apocalyptic number.

It is an amenable number.

61115106100 is an abundant number, since it is smaller than the sum of its proper divisors (71504674354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61115106100 is a wasteful number, since it uses less digits than its factorization.

61115106100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 611151075 (or 611151068 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 22.

Adding to 61115106100 its reverse (160151116), we get a palindrome (61275257216).

The spelling of 61115106100 in words is "sixty-one billion, one hundred fifteen million, one hundred six thousand, one hundred".