400726345173 has 48 divisors (see below), whose sum is σ = 681445670400. Its totient is φ = 207123285600.

The previous prime is 400726345153. The next prime is 400726345199. The reversal of 400726345173 is 371543627004.

It is not a de Polignac number, because 400726345173 - 2⁵ = 400726345141 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400726345153) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 300883 + ... + 944448.

It is an arithmetic number, because the mean of its divisors is an integer number (14196784800).

Almost surely, 2^400726345173 is an apocalyptic number.

It is an amenable number.

400726345173 is a deficient number, since it is larger than the sum of its proper divisors (280719325227).

400726345173 is a wasteful number, since it uses less digits than its factorization.

400726345173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1245558 (or 1245551 counting only the distinct ones).

The product of its (nonzero) digits is 423360, while the sum is 42.

The spelling of 400726345173 in words is "four hundred billion, seven hundred twenty-six million, three hundred forty-five thousand, one hundred seventy-three".