40042624618 has 4 divisors (see below), whose sum is σ = 60063936930. Its totient is φ = 20021312308.

The previous prime is 40042624591. The next prime is 40042624673. The reversal of 40042624618 is 81642624004.

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 only one way, i.e., 37652685849 + 2389938769 = 194043^2 + 48887^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010656153 + ... + 10010656156.

Almost surely, 2^40042624618 is an apocalyptic number.

40042624618 is a deficient number, since it is larger than the sum of its proper divisors (20021312312).

40042624618 is a wasteful number, since it uses less digits than its factorization.

40042624618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20021312311.

The product of its (nonzero) digits is 73728, while the sum is 37.

The spelling of 40042624618 in words is "forty billion, forty-two million, six hundred twenty-four thousand, six hundred eighteen".