45454687981 has 32 divisors (see below), whose sum is σ = 49567795200. Its totient is φ = 41541776640.

The previous prime is 45454687961. The next prime is 45454688003. The reversal of 45454687981 is 18978645454.

It is a cyclic number.

It is not a de Polignac number, because 45454687981 - 2²³ = 45446299373 is a prime.

It is a super-2 number, since 2×45454687981² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (45454687921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 25578565 + ... + 25580341.

It is an arithmetic number, because the mean of its divisors is an integer number (1548993600).

Almost surely, 2^45454687981 is an apocalyptic number.

It is an amenable number.

45454687981 is a deficient number, since it is larger than the sum of its proper divisors (4113107219).

45454687981 is a wasteful number, since it uses less digits than its factorization.

45454687981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2209.

The product of its digits is 38707200, while the sum is 61.

The spelling of 45454687981 in words is "forty-five billion, four hundred fifty-four million, six hundred eighty-seven thousand, nine hundred eighty-one".