400718886729 has 16 divisors (see below), whose sum is σ = 614508555648. Its totient is φ = 227523733632.

The previous prime is 400718886721. The next prime is 400718886761. The reversal of 400718886729 is 927688817004.

It is not a de Polignac number, because 400718886729 - 2³ = 400718886721 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400718886721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60766932 + ... + 60773525.

It is an arithmetic number, because the mean of its divisors is an integer number (38406784728).

Almost surely, 2^400718886729 is an apocalyptic number.

It is an amenable number.

400718886729 is a deficient number, since it is larger than the sum of its proper divisors (213789668919).

400718886729 is a wasteful number, since it uses less digits than its factorization.

400718886729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121540624.

The product of its (nonzero) digits is 10838016, while the sum is 60.

The spelling of 400718886729 in words is "four hundred billion, seven hundred eighteen million, eight hundred eighty-six thousand, seven hundred twenty-nine".