400316185491 has 8 divisors (see below), whose sum is σ = 534679968144. Its totient is φ = 266414929920.

The previous prime is 400316185483. The next prime is 400316185501. The reversal of 400316185491 is 194581613004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400316185491 - 2³ = 400316185483 is a prime.

It is a super-2 number, since 2×400316185491² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400316185481) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 115629750 + ... + 115633211.

It is an arithmetic number, because the mean of its divisors is an integer number (66834996018).

Almost surely, 2^400316185491 is an apocalyptic number.

400316185491 is a deficient number, since it is larger than the sum of its proper divisors (134363782653).

400316185491 is a wasteful number, since it uses less digits than its factorization.

400316185491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231263541.

The product of its (nonzero) digits is 103680, while the sum is 42.

Adding to 400316185491 its reverse (194581613004), we get a palindrome (594897798495).

The spelling of 400316185491 in words is "four hundred billion, three hundred sixteen million, one hundred eighty-five thousand, four hundred ninety-one".