40242252645 has 48 divisors (see below), whose sum is σ = 80507336832. Its totient is φ = 18214300800.

The previous prime is 40242252641. The next prime is 40242252647. The reversal of 40242252645 is 54625224204.

40242252645 is a `hidden beast` number, since 4 + 0 + 2 + 4 + 2 + 2 + 5 + 2 + 645 = 666.

It is not a de Polignac number, because 40242252645 - 2² = 40242252641 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40242252641) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 600627 + ... + 664256.

It is an arithmetic number, because the mean of its divisors is an integer number (1677236184).

Almost surely, 2^40242252645 is an apocalyptic number.

40242252645 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

40242252645 is an abundant number, since it is smaller than the sum of its proper divisors (40265084187).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40242252645 is a wasteful number, since it uses less digits than its factorization.

40242252645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1265002 (or 1264999 counting only the distinct ones).

The product of its (nonzero) digits is 153600, while the sum is 36.

Adding to 40242252645 its reverse (54625224204), we get a palindrome (94867476849).

The spelling of 40242252645 in words is "forty billion, two hundred forty-two million, two hundred fifty-two thousand, six hundred forty-five".