400478774851 has 8 divisors (see below), whose sum is σ = 401204460384. Its totient is φ = 399753744960.

The previous prime is 400478774831. The next prime is 400478774903. The reversal of 400478774851 is 158477874004.

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 400478774851 - 2⁵ = 400478774819 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400478774792 and 400478774801.

It is not an unprimeable number, because it can be changed into a prime (400478774831) 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, 1067185 + ... + 1392781.

It is an arithmetic number, because the mean of its divisors is an integer number (50150557548).

Almost surely, 2^400478774851 is an apocalyptic number.

400478774851 is a deficient number, since it is larger than the sum of its proper divisors (725685533).

400478774851 is a wasteful number, since it uses less digits than its factorization.

400478774851 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 327821.

The product of its (nonzero) digits is 7024640, while the sum is 55.

The spelling of 400478774851 in words is "four hundred billion, four hundred seventy-eight million, seven hundred seventy-four thousand, eight hundred fifty-one".