40135733618 has 8 divisors (see below), whose sum is σ = 60409074348. Its totient is φ = 19999375504.

The previous prime is 40135733593. The next prime is 40135733623. The reversal of 40135733618 is 81633753104.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 38027730049 + 2108003569 = 195007^2 + 45913^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×40135733618² (a number of 22 digits) contains 22 as substring.

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, 34244921 + ... + 34246092.

Almost surely, 2^40135733618 is an apocalyptic number.

40135733618 is a deficient number, since it is larger than the sum of its proper divisors (20273340730).

40135733618 is a wasteful number, since it uses less digits than its factorization.

40135733618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68491308.

The product of its (nonzero) digits is 181440, while the sum is 41.

The spelling of 40135733618 in words is "forty billion, one hundred thirty-five million, seven hundred thirty-three thousand, six hundred eighteen".