401393823414391 has 4 divisors (see below), whose sum is σ = 401541884583984. Its totient is φ = 401245762244800.

The previous prime is 401393823414371. The next prime is 401393823414427. The reversal of 401393823414391 is 193414328393104.

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-401393823414391 is a prime.

It is a super-2 number, since 2×401393823414391² (a number of 30 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 (401393823414341) 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, 74030580730 + ... + 74030586151.

It is an arithmetic number, because the mean of its divisors is an integer number (100385471145996).

Almost surely, 2^{401393823414391} is an apocalyptic number.

401393823414391 is a deficient number, since it is larger than the sum of its proper divisors (148061169593).

401393823414391 is a wasteful number, since it uses less digits than its factorization.

401393823414391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148061169592.

The product of its (nonzero) digits is 6718464, while the sum is 55.

The spelling of 401393823414391 in words is "four hundred one trillion, three hundred ninety-three billion, eight hundred twenty-three million, four hundred fourteen thousand, three hundred ninety-one".