61115650028 has 24 divisors (see below), whose sum is σ = 107201149440. Its totient is φ = 30486834000.

The previous prime is 61115649943. The next prime is 61115650031. The reversal of 61115650028 is 82005651116.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 61115650028.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3183683 + ... + 3202821.

It is an arithmetic number, because the mean of its divisors is an integer number (4466714560).

Almost surely, 2^61115650028 is an apocalyptic number.

It is an amenable number.

61115650028 is a deficient number, since it is larger than the sum of its proper divisors (46085499412).

61115650028 is a wasteful number, since it uses less digits than its factorization.

61115650028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20957 (or 20955 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 35.

The spelling of 61115650028 in words is "sixty-one billion, one hundred fifteen million, six hundred fifty thousand, twenty-eight".