61115111000 has 64 divisors (see below), whose sum is σ = 144819792000. Its totient is φ = 24136569600.

The previous prime is 61115110963. The next prime is 61115111051. The reversal of 61115111000 is 11151116.

It is a self number, because there is not a number n which added to its sum of digits gives 61115111000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307805 + ... + 465804.

It is an arithmetic number, because the mean of its divisors is an integer number (2262809250).

Almost surely, 2^61115111000 is an apocalyptic number.

It is an amenable number.

61115111000 is an abundant number, since it is smaller than the sum of its proper divisors (83704681000).

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

61115111000 is a wasteful number, since it uses less digits than its factorization.

61115111000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 773709 (or 773695 counting only the distinct ones).

The product of its (nonzero) digits is 30, while the sum is 17.

Adding to 61115111000 its reverse (11151116), we get a palindrome (61126262116).

The spelling of 61115111000 in words is "sixty-one billion, one hundred fifteen million, one hundred eleven thousand".