400247036545 has 8 divisors (see below), whose sum is σ = 480372083496. Its totient is φ = 320147202816.

The previous prime is 400247036533. The next prime is 400247036611. The reversal of 400247036545 is 545630742004.

It can be written as a sum of positive squares in 4 ways, for example, as 148573244304 + 251673792241 = 385452^2 + 501671^2 .

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 400247036545 - 2⁵ = 400247036513 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400247036498 and 400247036507.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6268362 + ... + 6331891.

It is an arithmetic number, because the mean of its divisors is an integer number (60046510437).

Almost surely, 2^400247036545 is an apocalyptic number.

It is an amenable number.

400247036545 is a deficient number, since it is larger than the sum of its proper divisors (80125046951).

400247036545 is a wasteful number, since it uses less digits than its factorization.

400247036545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12606611.

The product of its (nonzero) digits is 403200, while the sum is 40.

Adding to 400247036545 its reverse (545630742004), we get a palindrome (945877778549).

The spelling of 400247036545 in words is "four hundred billion, two hundred forty-seven million, thirty-six thousand, five hundred forty-five".