61113978 has 12 divisors (see below), whose sum is σ = 132413658. Its totient is φ = 20371320.

The previous prime is 61113971. The next prime is 61114003. The reversal of 61113978 is 87931116.

61113978 is a `hidden beast` number, since 611 + 1 + 39 + 7 + 8 = 666.

61113978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 59954049 + 1159929 = 7743^2 + 1077^2 .

It is not an unprimeable number, because it can be changed into a prime (61113971) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1697593 + ... + 1697628.

Almost surely, 2^61113978 is an apocalyptic number.

61113978 is an abundant number, since it is smaller than the sum of its proper divisors (71299680).

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

61113978 is a wasteful number, since it uses less digits than its factorization.

61113978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395229 (or 3395226 counting only the distinct ones).

The product of its digits is 9072, while the sum is 36.

The square root of 61113978 is about 7817.5429643847. The cubic root of 61113978 is about 393.8947428554.

The spelling of 61113978 in words is "sixty-one million, one hundred thirteen thousand, nine hundred seventy-eight".