400350354184661 has 4 divisors (see below), whose sum is σ = 400735676952000. Its totient is φ = 399965031417324.

The previous prime is 400350354184601. The next prime is 400350354184709. The reversal of 400350354184661 is 166481453053004.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400350354184661 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400350354184601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 192661382111 + ... + 192661384188.

It is an arithmetic number, because the mean of its divisors is an integer number (100183919238000).

Almost surely, 2^{400350354184661} is an apocalyptic number.

It is an amenable number.

400350354184661 is a deficient number, since it is larger than the sum of its proper divisors (385322767339).

400350354184661 is a wasteful number, since it uses less digits than its factorization.

400350354184661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 385322767338.

The product of its (nonzero) digits is 4147200, while the sum is 50.

The spelling of 400350354184661 in words is "four hundred trillion, three hundred fifty billion, three hundred fifty-four million, one hundred eighty-four thousand, six hundred sixty-one".