45491692281 has 16 divisors (see below), whose sum is σ = 69735773184. Its totient is φ = 25839590544.

The previous prime is 45491692277. The next prime is 45491692313. The reversal of 45491692281 is 18229619454.

It is a happy number.

It is not a de Polignac number, because 45491692281 - 2² = 45491692277 is a prime.

It is a super-2 number, since 2×45491692281² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (45491692261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6482335 + ... + 6489348.

It is an arithmetic number, because the mean of its divisors is an integer number (4358485824).

Almost surely, 2^45491692281 is an apocalyptic number.

It is an amenable number.

45491692281 is a deficient number, since it is larger than the sum of its proper divisors (24244080903).

45491692281 is a wasteful number, since it uses less digits than its factorization.

45491692281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12971860.

The product of its digits is 1244160, while the sum is 51.

The spelling of 45491692281 in words is "forty-five billion, four hundred ninety-one million, six hundred ninety-two thousand, two hundred eighty-one".