5451478685 has 4 divisors (see below), whose sum is σ = 6541774428. Its totient is φ = 4361182944.

The previous prime is 5451478679. The next prime is 5451478687. The reversal of 5451478685 is 5868741545.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5868741545 = 5 ⋅1173748309.

It can be written as a sum of positive squares in 2 ways, for example, as 3623317636 + 1828161049 = 60194^2 + 42757^2 .

It is a cyclic number.

It is not a de Polignac number, because 5451478685 - 2²⁰ = 5450430109 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 (5451478687) 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, 545147864 + ... + 545147873.

It is an arithmetic number, because the mean of its divisors is an integer number (1635443607).

Almost surely, 2^5451478685 is an apocalyptic number.

It is an amenable number.

5451478685 is a deficient number, since it is larger than the sum of its proper divisors (1090295743).

5451478685 is a wasteful number, since it uses less digits than its factorization.

5451478685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1090295742.

The product of its digits is 5376000, while the sum is 53.

The square root of 5451478685 is about 73834.1295404774. The cubic root of 5451478685 is about 1759.9680052939.

The spelling of 5451478685 in words is "five billion, four hundred fifty-one million, four hundred seventy-eight thousand, six hundred eighty-five".