401501005399 has 4 divisors (see below), whose sum is σ = 432385698136. Its totient is φ = 370616312664.

The previous prime is 401501005393. The next prime is 401501005441. The reversal of 401501005399 is 993500105104.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-401501005399 is a prime.

It is a super-2 number, since 2×401501005399² (a number of 24 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 (401501005393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15442346349 + ... + 15442346374.

It is an arithmetic number, because the mean of its divisors is an integer number (108096424534).

Almost surely, 2^401501005399 is an apocalyptic number.

401501005399 is a deficient number, since it is larger than the sum of its proper divisors (30884692737).

401501005399 is a wasteful number, since it uses less digits than its factorization.

401501005399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30884692736.

The product of its (nonzero) digits is 24300, while the sum is 37.

The spelling of 401501005399 in words is "four hundred one billion, five hundred one million, five thousand, three hundred ninety-nine".