40640429345 has 4 divisors (see below), whose sum is σ = 48768515220. Its totient is φ = 32512343472.

The previous prime is 40640429327. The next prime is 40640429353. The reversal of 40640429345 is 54392404604.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 11039915041 + 29600514304 = 105071^2 + 172048^2 .

It is a cyclic number.

It is not a de Polignac number, because 40640429345 - 2¹² = 40640425249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4064042930 + ... + 4064042939.

It is an arithmetic number, because the mean of its divisors is an integer number (12192128805).

Almost surely, 2^40640429345 is an apocalyptic number.

It is an amenable number.

40640429345 is a deficient number, since it is larger than the sum of its proper divisors (8128085875).

40640429345 is an equidigital number, since it uses as much as digits as its factorization.

40640429345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8128085874.

The product of its (nonzero) digits is 414720, while the sum is 41.

The spelling of 40640429345 in words is "forty billion, six hundred forty million, four hundred twenty-nine thousand, three hundred forty-five".