400535161875 has 160 divisors (see below), whose sum is σ = 790201304640. Its totient is φ = 199749888000.

The previous prime is 400535161861. The next prime is 400535161879. The reversal of 400535161875 is 578161535004.

400535161875 is a `hidden beast` number, since 4 + 0 + 0 + 53 + 516 + 1 + 87 + 5 = 666.

It is not a de Polignac number, because 400535161875 - 2⁶ = 400535161811 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 400535161875.

It is not an unprimeable number, because it can be changed into a prime (400535161879) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 45034929 + ... + 45043821.

It is an arithmetic number, because the mean of its divisors is an integer number (4938758154).

Almost surely, 2^400535161875 is an apocalyptic number.

400535161875 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

400535161875 is a deficient number, since it is larger than the sum of its proper divisors (389666142765).

400535161875 is a wasteful number, since it uses less digits than its factorization.

400535161875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9096 (or 9075 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 45.

Adding to 400535161875 its reverse (578161535004), we get a palindrome (978696696879).

The spelling of 400535161875 in words is "four hundred billion, five hundred thirty-five million, one hundred sixty-one thousand, eight hundred seventy-five".