40001261479 has 4 divisors (see below), whose sum is σ = 40564659600. Its totient is φ = 39437863360.

The previous prime is 40001261473. The next prime is 40001261513. The reversal of 40001261479 is 97416210004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40001261479 - 2²¹ = 39999164327 is a prime.

It is a super-2 number, since 2×40001261479² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40001261473) 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 3 ways as a sum of consecutive naturals, for example, 281698954 + ... + 281699095.

It is an arithmetic number, because the mean of its divisors is an integer number (10141164900).

Almost surely, 2^40001261479 is an apocalyptic number.

40001261479 is a deficient number, since it is larger than the sum of its proper divisors (563398121).

40001261479 is an equidigital number, since it uses as much as digits as its factorization.

40001261479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563398120.

The product of its (nonzero) digits is 12096, while the sum is 34.

The spelling of 40001261479 in words is "forty billion, one million, two hundred sixty-one thousand, four hundred seventy-nine".