45661278 has 32 divisors (see below), whose sum is σ = 99088416. Its totient is φ = 13943808.

The previous prime is 45661267. The next prime is 45661387. The reversal of 45661278 is 87216654.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8550 + ... + 12822.

It is an arithmetic number, because the mean of its divisors is an integer number (3096513).

Almost surely, 2^45661278 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 45661278, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49544208).

45661278 is an abundant number, since it is smaller than the sum of its proper divisors (53427138).

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

45661278 is a wasteful number, since it uses less digits than its factorization.

45661278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428.

The product of its digits is 80640, while the sum is 39.

The square root of 45661278 is about 6757.3129274883. The cubic root of 45661278 is about 357.4231578859.

The spelling of 45661278 in words is "forty-five million, six hundred sixty-one thousand, two hundred seventy-eight".