61618473 has 12 divisors (see below), whose sum is σ = 101719488. Its totient is φ = 35210520.

The previous prime is 61618471. The next prime is 61618511. The reversal of 61618473 is 37481616.

61618473 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 61618473 - 2¹ = 61618471 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61618471) 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 11 ways as a sum of consecutive naturals, for example, 488973 + ... + 489098.

It is an arithmetic number, because the mean of its divisors is an integer number (8476624).

Almost surely, 2^61618473 is an apocalyptic number.

61618473 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

It is an amenable number.

61618473 is a deficient number, since it is larger than the sum of its proper divisors (40101015).

61618473 is a wasteful number, since it uses less digits than its factorization.

61618473 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978084 (or 978081 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 61618473 is about 7849.7434989941. The cubic root of 61618473 is about 394.9756391535.

The spelling of 61618473 in words is "sixty-one million, six hundred eighteen thousand, four hundred seventy-three".