401355371671 has 4 divisors (see below), whose sum is σ = 409894847712. Its totient is φ = 392815895632.

The previous prime is 401355371647. The next prime is 401355371707. The reversal of 401355371671 is 176173553104.

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 401355371671 - 2⁵ = 401355371639 is a prime.

It is a super-2 number, since 2×401355371671² (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 (401355771671) 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, 4269737950 + ... + 4269738043.

It is an arithmetic number, because the mean of its divisors is an integer number (102473711928).

Almost surely, 2^401355371671 is an apocalyptic number.

401355371671 is a deficient number, since it is larger than the sum of its proper divisors (8539476041).

401355371671 is an equidigital number, since it uses as much as digits as its factorization.

401355371671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8539476040.

The product of its (nonzero) digits is 264600, while the sum is 43.

The spelling of 401355371671 in words is "four hundred one billion, three hundred fifty-five million, three hundred seventy-one thousand, six hundred seventy-one".