40823798401 has 3 divisors (see below), whose sum is σ = 40824000451. Its totient is φ = 40823596352.

The previous prime is 40823798387. The next prime is 40823798429. The reversal of 40823798401 is 10489732804.

The square root of 40823798401 is 202049.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 8911548801 + 31912249600 = 94401^2 + 178640^2 .

It is not a de Polignac number, because 40823798401 - 2⁵ = 40823798369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40823798201) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 101025 + ... + 303073.

Almost surely, 2^40823798401 is an apocalyptic number.

40823798401 is the 202049-th square number.

40823798401 is the 101025-th centered octagonal number.

It is an amenable number.

40823798401 is a deficient number, since it is larger than the sum of its proper divisors (202050).

40823798401 is an frugal number, since it uses more digits than its factorization.

40823798401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404098 (or 202049 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 46.

The spelling of 40823798401 in words is "forty billion, eight hundred twenty-three million, seven hundred ninety-eight thousand, four hundred one".