400145640961 has 8 divisors (see below), whose sum is σ = 448320423744. Its totient is φ = 353937175920.

The previous prime is 400145640911. The next prime is 400145640989. The reversal of 400145640961 is 169046541004.

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

It is a cyclic number.

It is not a de Polignac number, because 400145640961 - 2¹⁵ = 400145608193 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400145640911) 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, 491579005 + ... + 491579818.

It is an arithmetic number, because the mean of its divisors is an integer number (56040052968).

Almost surely, 2^400145640961 is an apocalyptic number.

It is an amenable number.

400145640961 is a deficient number, since it is larger than the sum of its proper divisors (48174782783).

400145640961 is a wasteful number, since it uses less digits than its factorization.

400145640961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 983158871.

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 400145640961 in words is "four hundred billion, one hundred forty-five million, six hundred forty thousand, nine hundred sixty-one".