5401668865 has 8 divisors (see below), whose sum is σ = 6491812968. Its totient is φ = 4314794880.

The previous prime is 5401668863. The next prime is 5401668871. The reversal of 5401668865 is 5688661045.

It can be written as a sum of positive squares in 4 ways, for example, as 2476157121 + 2925511744 = 49761^2 + 54088^2 .

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

It is not a de Polignac number, because 5401668865 - 2¹ = 5401668863 is a prime.

It is a super-2 number, since 2×5401668865² = 58356053054220776450, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5401668863) 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, 813892 + ... + 820501.

It is an arithmetic number, because the mean of its divisors is an integer number (811476621).

Almost surely, 2^5401668865 is an apocalyptic number.

It is an amenable number.

5401668865 is a deficient number, since it is larger than the sum of its proper divisors (1090144103).

5401668865 is a wasteful number, since it uses less digits than its factorization.

5401668865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635059.

The product of its (nonzero) digits is 1382400, while the sum is 49.

The square root of 5401668865 is about 73496.0465943577. The cubic root of 5401668865 is about 1754.5913573074.

The spelling of 5401668865 in words is "five billion, four hundred one million, six hundred sixty-eight thousand, eight hundred sixty-five".