401847965639 has 4 divisors (see below), whose sum is σ = 401862335640. Its totient is φ = 401833595640.

The previous prime is 401847965593. The next prime is 401847965647. The reversal of 401847965639 is 936569748104.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-401847965639 is a prime.

It is a super-2 number, since 2×401847965639² (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 (401847905639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7142972 + ... + 7199009.

It is an arithmetic number, because the mean of its divisors is an integer number (100465583910).

Almost surely, 2^401847965639 is an apocalyptic number.

401847965639 is a deficient number, since it is larger than the sum of its proper divisors (14370001).

401847965639 is a wasteful number, since it uses less digits than its factorization.

401847965639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14370000.

The product of its (nonzero) digits is 39191040, while the sum is 62.

The spelling of 401847965639 in words is "four hundred one billion, eight hundred forty-seven million, nine hundred sixty-five thousand, six hundred thirty-nine".