402240226664 has 8 divisors (see below), whose sum is σ = 754200425010. Its totient is φ = 201120113328.

The previous prime is 402240226637. The next prime is 402240226669. The reversal of 402240226664 is 466622042204.

It can be written as a sum of positive squares in only one way, i.e., 398340224164 + 3900002500 = 631142^2 + 62450^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (402240226669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25140014159 + ... + 25140014174.

Almost surely, 2^402240226664 is an apocalyptic number.

It is an amenable number.

402240226664 is a deficient number, since it is larger than the sum of its proper divisors (351960198346).

402240226664 is a wasteful number, since it uses less digits than its factorization.

402240226664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50280028339 (or 50280028335 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 38.

Adding to 402240226664 its reverse (466622042204), we get a palindrome (868862268868).

The spelling of 402240226664 in words is "four hundred two billion, two hundred forty million, two hundred twenty-six thousand, six hundred sixty-four".