4001261240886 has 64 divisors (see below), whose sum is σ = 9859771181568. Its totient is φ = 1054151324928.

The previous prime is 4001261240881. The next prime is 4001261240887. The reversal of 4001261240886 is 6880421621004.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001261240881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3398920 + ... + 4422123.

It is an arithmetic number, because the mean of its divisors is an integer number (154058924712).

Almost surely, 2^{4001261240886} is an apocalyptic number.

4001261240886 is an abundant number, since it is smaller than the sum of its proper divisors (5858509940682).

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

4001261240886 is a wasteful number, since it uses less digits than its factorization.

4001261240886 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7822005.

The product of its (nonzero) digits is 147456, while the sum is 42.

The spelling of 4001261240886 in words is "four trillion, one billion, two hundred sixty-one million, two hundred forty thousand, eight hundred eighty-six".