45557779 has 4 divisors (see below), whose sum is σ = 47538576. Its totient is φ = 43576984.

The previous prime is 45557777. The next prime is 45557819. The reversal of 45557779 is 97775554.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97775554 = 2 ⋅48887777.

It is a cyclic number.

It is not a de Polignac number, because 45557779 - 2¹ = 45557777 is a prime.

It is a super-2 number, since 2×45557779² = 4151022454825682, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (45557777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 990364 + ... + 990409.

It is an arithmetic number, because the mean of its divisors is an integer number (11884644).

Almost surely, 2^45557779 is an apocalyptic number.

45557779 is a deficient number, since it is larger than the sum of its proper divisors (1980797).

45557779 is a wasteful number, since it uses less digits than its factorization.

45557779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1980796.

The product of its digits is 1543500, while the sum is 49.

The square root of 45557779 is about 6749.6502872371. The cubic root of 45557779 is about 357.1529002661.

The spelling of 45557779 in words is "forty-five million, five hundred fifty-seven thousand, seven hundred seventy-nine".