2139547494 has 16 divisors (see below), whose sum is σ = 4890394368. Its totient is φ = 611299272.

The previous prime is 2139547493. The next prime is 2139547507. The reversal of 2139547494 is 4947459312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2139547493) 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, 25470762 + ... + 25470845.

It is an arithmetic number, because the mean of its divisors is an integer number (305649648).

Almost surely, 2^2139547494 is an apocalyptic number.

2139547494 is an abundant number, since it is smaller than the sum of its proper divisors (2750846874).

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

2139547494 is a wasteful number, since it uses less digits than its factorization.

2139547494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50941619.

The product of its digits is 1088640, while the sum is 48.

The square root of 2139547494 is about 46255.2428812129. The cubic root of 2139547494 is about 1288.5679065735.

The spelling of 2139547494 in words is "two billion, one hundred thirty-nine million, five hundred forty-seven thousand, four hundred ninety-four".