4006156351561 has 24 divisors (see below), whose sum is σ = 5058924028800. Its totient is φ = 3169706078448.

The previous prime is 4006156351537. The next prime is 4006156351573. The reversal of 4006156351561 is 1651536516004.

It is not a de Polignac number, because 4006156351561 - 2⁷ = 4006156351433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4006156351591) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 34497525 + ... + 34613458.

It is an arithmetic number, because the mean of its divisors is an integer number (210788501200).

Almost surely, 2^{4006156351561} is an apocalyptic number.

It is an amenable number.

4006156351561 is a deficient number, since it is larger than the sum of its proper divisors (1052767677239).

4006156351561 is an equidigital number, since it uses as much as digits as its factorization.

4006156351561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69111030 (or 69111003 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 43.

The spelling of 4006156351561 in words is "four trillion, six billion, one hundred fifty-six million, three hundred fifty-one thousand, five hundred sixty-one".