3640158923778 has 48 divisors (see below), whose sum is σ = 8501227982520. Its totient is φ = 1119056746752.

The previous prime is 3640158923777. The next prime is 3640158923783. The reversal of 3640158923778 is 8773298510463.

3640158923778 is a `hidden beast` number, since 3 + 6 + 40 + 1 + 589 + 2 + 3 + 7 + 7 + 8 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2773533844449 + 866625079329 = 1665393^2 + 930927^2 .

It is not an unprimeable number, because it can be changed into a prime (3640158923777) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 6625201 + ... + 7153572.

It is a 1-persistent number, because it is pandigital, but 2⋅3640158923778 = 7280317847556 is not.

Almost surely, 2^{3640158923778} is an apocalyptic number.

3640158923778 is an abundant number, since it is smaller than the sum of its proper divisors (4861069058742).

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

3640158923778 is a wasteful number, since it uses less digits than its factorization.

3640158923778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13779923 (or 13779920 counting only the distinct ones).

The product of its (nonzero) digits is 60963840, while the sum is 63.

The spelling of 3640158923778 in words is "three trillion, six hundred forty billion, one hundred fifty-eight million, nine hundred twenty-three thousand, seven hundred seventy-eight".