400242721746 has 32 divisors (see below), whose sum is σ = 939565929600. Its totient is φ = 111264385536.

The previous prime is 400242721667. The next prime is 400242721849. The reversal of 400242721746 is 647127242004.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128776671 + ... + 128779778.

It is an arithmetic number, because the mean of its divisors is an integer number (29361435300).

Almost surely, 2^400242721746 is an apocalyptic number.

400242721746 is an abundant number, since it is smaller than the sum of its proper divisors (539323207854).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400242721746 is a wasteful number, since it uses less digits than its factorization.

400242721746 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257556498.

The product of its (nonzero) digits is 150528, while the sum is 39.

The spelling of 400242721746 in words is "four hundred billion, two hundred forty-two million, seven hundred twenty-one thousand, seven hundred forty-six".