45505649 has 4 divisors (see below), whose sum is σ = 52006464. Its totient is φ = 39004836.

The previous prime is 45505637. The next prime is 45505679. The reversal of 45505649 is 94650554.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 94650554 = 2 ⋅47325277.

It is a cyclic number.

It is not a de Polignac number, because 45505649 - 2⁴ = 45505633 is a prime.

It is a super-2 number, since 2×45505649² = 4141528181822402, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45505619) 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, 3250397 + ... + 3250410.

It is an arithmetic number, because the mean of its divisors is an integer number (13001616).

Almost surely, 2^45505649 is an apocalyptic number.

It is an amenable number.

45505649 is a deficient number, since it is larger than the sum of its proper divisors (6500815).

45505649 is an equidigital number, since it uses as much as digits as its factorization.

45505649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6500814.

The product of its (nonzero) digits is 108000, while the sum is 38.

The square root of 45505649 is about 6745.7875003590. The cubic root of 45505649 is about 357.0166228689.

The spelling of 45505649 in words is "forty-five million, five hundred five thousand, six hundred forty-nine".