61955918 has 16 divisors (see below), whose sum is σ = 96253440. Its totient is φ = 29878200.

The previous prime is 61955911. The next prime is 61955953. The reversal of 61955918 is 81955916.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61955911) 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, 19013 + ... + 22031.

It is an arithmetic number, because the mean of its divisors is an integer number (6015840).

Almost surely, 2^61955918 is an apocalyptic number.

61955918 is a deficient number, since it is larger than the sum of its proper divisors (34297522).

61955918 is a wasteful number, since it uses less digits than its factorization.

61955918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3383.

The product of its digits is 97200, while the sum is 44.

The square root of 61955918 is about 7871.2081664761. The cubic root of 61955918 is about 395.6953366970.

The spelling of 61955918 in words is "sixty-one million, nine hundred fifty-five thousand, nine hundred eighteen".