5631378540 has 48 divisors (see below), whose sum is σ = 16194024672. Its totient is φ = 1461113856.

The previous prime is 5631378527. The next prime is 5631378547. The reversal of 5631378540 is 458731365.

It is a junction number, because it is equal to n+sod(n) for n = 5631378492 and 5631378501.

It is not an unprimeable number, because it can be changed into a prime (5631378547) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1266109 + ... + 1270548.

It is an arithmetic number, because the mean of its divisors is an integer number (337375514).

Almost surely, 2^5631378540 is an apocalyptic number.

It is an amenable number.

5631378540 is an abundant number, since it is smaller than the sum of its proper divisors (10562646132).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5631378540 is a wasteful number, since it uses less digits than its factorization.

5631378540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2536706 (or 2536704 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 42.

The square root of 5631378540 is about 75042.5115517864. The cubic root of 5631378540 is about 1779.1186290129.

The spelling of 5631378540 in words is "five billion, six hundred thirty-one million, three hundred seventy-eight thousand, five hundred forty".