40306210649 has 4 divisors (see below), whose sum is σ = 40309229520. Its totient is φ = 40303191780.

The previous prime is 40306210631. The next prime is 40306210661. The reversal of 40306210649 is 94601260304.

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 a de Polignac number, because none of the positive numbers 2^k-40306210649 is a prime.

It is a super-2 number, since 2×40306210649² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40306216649) 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, 1489319 + ... + 1516140.

It is an arithmetic number, because the mean of its divisors is an integer number (10077307380).

Almost surely, 2^40306210649 is an apocalyptic number.

It is an amenable number.

40306210649 is a deficient number, since it is larger than the sum of its proper divisors (3018871).

40306210649 is a wasteful number, since it uses less digits than its factorization.

40306210649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3018870.

The product of its (nonzero) digits is 31104, while the sum is 35.

The spelling of 40306210649 in words is "forty billion, three hundred six million, two hundred ten thousand, six hundred forty-nine".