45161491 has 8 divisors (see below), whose sum is σ = 46191600. Its totient is φ = 44140320.

The previous prime is 45161449. The next prime is 45161507. The reversal of 45161491 is 19416154.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 45161491 - 2¹⁵ = 45128723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (45161191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8565 + ... + 12793.

It is an arithmetic number, because the mean of its divisors is an integer number (5773950).

Almost surely, 2^45161491 is an apocalyptic number.

45161491 is a deficient number, since it is larger than the sum of its proper divisors (1030109).

45161491 is a wasteful number, since it uses less digits than its factorization.

45161491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4469.

The product of its digits is 4320, while the sum is 31.

The square root of 45161491 is about 6720.2299811837. The cubic root of 45161491 is about 356.1143085983.

The spelling of 45161491 in words is "forty-five million, one hundred sixty-one thousand, four hundred ninety-one".