45121778 has 16 divisors (see below), whose sum is σ = 73918656. Its totient is φ = 20531280.

The previous prime is 45121777. The next prime is 45121787. The reversal of 45121778 is 87712154.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (45121777) 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, 10376 + ... + 14067.

It is an arithmetic number, because the mean of its divisors is an integer number (4619916).

Almost surely, 2^45121778 is an apocalyptic number.

45121778 is a deficient number, since it is larger than the sum of its proper divisors (28796878).

45121778 is a wasteful number, since it uses less digits than its factorization.

45121778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24529.

The product of its digits is 15680, while the sum is 35.

The square root of 45121778 is about 6717.2745961439. The cubic root of 45121778 is about 356.0098943090.

The spelling of 45121778 in words is "forty-five million, one hundred twenty-one thousand, seven hundred seventy-eight".