402525420145544 has 8 divisors (see below), whose sum is σ = 754735162772910. Its totient is φ = 201262710072768.

The previous prime is 402525420145523. The next prime is 402525420145549. The reversal of 402525420145544 is 445541024525204.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 296726463062500 + 105798957083044 = 17225750^2 + 10285862^2 .

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 (402525420145549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25157838759089 + ... + 25157838759104.

Almost surely, 2^{402525420145544} is an apocalyptic number.

It is an amenable number.

402525420145544 is a deficient number, since it is larger than the sum of its proper divisors (352209742627366).

402525420145544 is a wasteful number, since it uses less digits than its factorization.

402525420145544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50315677518199 (or 50315677518195 counting only the distinct ones).

The product of its (nonzero) digits is 5120000, while the sum is 47.

The spelling of 402525420145544 in words is "four hundred two trillion, five hundred twenty-five billion, four hundred twenty million, one hundred forty-five thousand, five hundred forty-four".