40020143778 has 12 divisors (see below), whose sum is σ = 86710311558. Its totient is φ = 13340047920.

The previous prime is 40020143767. The next prime is 40020143789. The reversal of 40020143778 is 87734102004.

It is a happy number.

40020143778 is a `hidden beast` number, since 400 + 201 + 43 + 7 + 7 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (40020143767) and next prime (40020143789).

It can be written as a sum of positive squares in only one way, i.e., 27283441329 + 12736702449 = 165177^2 + 112857^2 .

It is a super-2 number, since 2×40020143778² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1111670643 + ... + 1111670678.

Almost surely, 2^40020143778 is an apocalyptic number.

40020143778 is an abundant number, since it is smaller than the sum of its proper divisors (46690167780).

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

40020143778 is a wasteful number, since it uses less digits than its factorization.

40020143778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2223341329 (or 2223341326 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 36.

The spelling of 40020143778 in words is "forty billion, twenty million, one hundred forty-three thousand, seven hundred seventy-eight".