400851008002 has 4 divisors (see below), whose sum is σ = 601276512006. Its totient is φ = 200425504000.

The previous prime is 400851007951. The next prime is 400851008009. The reversal of 400851008002 is 200800158004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 231823953361 + 169027054641 = 481481^2 + 411129^2 .

It is not an unprimeable number, because it can be changed into a prime (400851008009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100212751999 + ... + 100212752002.

Almost surely, 2^400851008002 is an apocalyptic number.

400851008002 is a deficient number, since it is larger than the sum of its proper divisors (200425504004).

400851008002 is a wasteful number, since it uses less digits than its factorization.

400851008002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200425504003.

The product of its (nonzero) digits is 2560, while the sum is 28.

The spelling of 400851008002 in words is "four hundred billion, eight hundred fifty-one million, eight thousand, two".