45212784781 has 4 divisors (see below), whose sum is σ = 45220317472. Its totient is φ = 45205252092.

The previous prime is 45212784779. The next prime is 45212784803. The reversal of 45212784781 is 18748721254.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 45212784781 - 2¹ = 45212784779 is a prime.

It is a super-2 number, since 2×45212784781² (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 (45212784181) 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, 3757335 + ... + 3769348.

It is an arithmetic number, because the mean of its divisors is an integer number (11305079368).

Almost surely, 2^45212784781 is an apocalyptic number.

It is an amenable number.

45212784781 is a deficient number, since it is larger than the sum of its proper divisors (7532691).

45212784781 is an equidigital number, since it uses as much as digits as its factorization.

45212784781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7532690.

The product of its digits is 1003520, while the sum is 49.

The spelling of 45212784781 in words is "forty-five billion, two hundred twelve million, seven hundred eighty-four thousand, seven hundred eighty-one".