400272730651 has 4 divisors (see below), whose sum is σ = 400329911304. Its totient is φ = 400215550000.

The previous prime is 400272730621. The next prime is 400272730657. The reversal of 400272730651 is 156037272004.

It is a happy number.

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 400272730651 - 2³⁵ = 365912992283 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400272730651.

It is not an unprimeable number, because it can be changed into a prime (400272730657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28579825 + ... + 28593826.

It is an arithmetic number, because the mean of its divisors is an integer number (100082477826).

Almost surely, 2^400272730651 is an apocalyptic number.

400272730651 is a deficient number, since it is larger than the sum of its proper divisors (57180653).

400272730651 is an equidigital number, since it uses as much as digits as its factorization.

400272730651 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57180652.

The product of its (nonzero) digits is 70560, while the sum is 37.

The spelling of 400272730651 in words is "four hundred billion, two hundred seventy-two million, seven hundred thirty thousand, six hundred fifty-one".