400345621571 has 8 divisors (see below), whose sum is σ = 457956469344. Its totient is φ = 342839427840.

The previous prime is 400345621561. The next prime is 400345621607. The reversal of 400345621571 is 175126543004.

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

It is not a de Polignac number, because 400345621571 - 2¹⁰ = 400345620547 is a prime.

It is a super-2 number, since 2×400345621571² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400345621561) 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, 26155310 + ... + 26170611.

It is an arithmetic number, because the mean of its divisors is an integer number (57244558668).

Almost surely, 2^400345621571 is an apocalyptic number.

400345621571 is a deficient number, since it is larger than the sum of its proper divisors (57610847773).

400345621571 is a wasteful number, since it uses less digits than its factorization.

400345621571 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52327021.

The product of its (nonzero) digits is 100800, while the sum is 38.

The spelling of 400345621571 in words is "four hundred billion, three hundred forty-five million, six hundred twenty-one thousand, five hundred seventy-one".