40156646136321 has 32 divisors (see below), whose sum is σ = 62950121515008. Its totient is φ = 22448326904640.

The previous prime is 40156646136307. The next prime is 40156646136331. The reversal of 40156646136321 is 12363164665104.

It is a happy number.

It is not a de Polignac number, because 40156646136321 - 2⁷ = 40156646136193 is a prime.

It is a super-2 number, since 2×40156646136321² (a number of 28 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40156646136331) 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 31 ways as a sum of consecutive naturals, for example, 34700211 + ... + 35838776.

It is an arithmetic number, because the mean of its divisors is an integer number (1967191297344).

Almost surely, 2^{40156646136321} is an apocalyptic number.

It is an amenable number.

40156646136321 is a deficient number, since it is larger than the sum of its proper divisors (22793475378687).

40156646136321 is a wasteful number, since it uses less digits than its factorization.

40156646136321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70540341.

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 40156646136321 in words is "forty trillion, one hundred fifty-six billion, six hundred forty-six million, one hundred thirty-six thousand, three hundred twenty-one".