5481187537 has 4 divisors (see below), whose sum is σ = 6264214336. Its totient is φ = 4698160740.

The previous prime is 5481187519. The next prime is 5481187567. The reversal of 5481187537 is 7357811845.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 5481187537 - 2⁷ = 5481187409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5481187567) 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, 391513389 + ... + 391513402.

It is an arithmetic number, because the mean of its divisors is an integer number (1566053584).

Almost surely, 2^5481187537 is an apocalyptic number.

It is an amenable number.

5481187537 is a deficient number, since it is larger than the sum of its proper divisors (783026799).

5481187537 is an equidigital number, since it uses as much as digits as its factorization.

5481187537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783026798.

The product of its digits is 940800, while the sum is 49.

The square root of 5481187537 is about 74035.0426284743. The cubic root of 5481187537 is about 1763.1593066281.

The spelling of 5481187537 in words is "five billion, four hundred eighty-one million, one hundred eighty-seven thousand, five hundred thirty-seven".