406720540371 has 4 divisors (see below), whose sum is σ = 542294053832. Its totient is φ = 271147026912.

The previous prime is 406720540363. The next prime is 406720540403. The reversal of 406720540371 is 173045027604.

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

It is not a de Polignac number, because 406720540371 - 2³ = 406720540363 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406720540571) 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, 67786756726 + ... + 67786756731.

It is an arithmetic number, because the mean of its divisors is an integer number (135573513458).

Almost surely, 2^406720540371 is an apocalyptic number.

406720540371 is a deficient number, since it is larger than the sum of its proper divisors (135573513461).

406720540371 is a wasteful number, since it uses less digits than its factorization.

406720540371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135573513460.

The product of its (nonzero) digits is 141120, while the sum is 39.

Adding to 406720540371 its reverse (173045027604), we get a palindrome (579765567975).

The spelling of 406720540371 in words is "four hundred six billion, seven hundred twenty million, five hundred forty thousand, three hundred seventy-one".