61918122 has 16 divisors (see below), whose sum is σ = 141527232. Its totient is φ = 17690880.

The previous prime is 61918121. The next prime is 61918147. The reversal of 61918122 is 22181916.

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 61918122.

It is not an unprimeable number, because it can be changed into a prime (61918121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 737079 + ... + 737162.

It is an arithmetic number, because the mean of its divisors is an integer number (8845452).

Almost surely, 2^61918122 is an apocalyptic number.

61918122 is an abundant number, since it is smaller than the sum of its proper divisors (79609110).

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

61918122 is a wasteful number, since it uses less digits than its factorization.

61918122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1474253.

The product of its digits is 1728, while the sum is 30.

The square root of 61918122 is about 7868.8068981263. The cubic root of 61918122 is about 395.6148561248.

The spelling of 61918122 in words is "sixty-one million, nine hundred eighteen thousand, one hundred twenty-two".