5137121340 has 72 divisors (see below), whose sum is σ = 16781270688. Its totient is φ = 1264521600.

The previous prime is 5137121309. The next prime is 5137121357. The reversal of 5137121340 is 431217315.

5137121340 is a `hidden beast` number, since 513 + 7 + 12 + 134 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1095336 + ... + 1100015.

It is an arithmetic number, because the mean of its divisors is an integer number (233073204).

Almost surely, 2^5137121340 is an apocalyptic number.

It is an amenable number.

5137121340 is an abundant number, since it is smaller than the sum of its proper divisors (11644149348).

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

5137121340 is a wasteful number, since it uses less digits than its factorization.

5137121340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2195379 (or 2195374 counting only the distinct ones).

The product of its (nonzero) digits is 2520, while the sum is 27.

The square root of 5137121340 is about 71673.7144286523. The cubic root of 5137121340 is about 1725.4668024636.

Adding to 5137121340 its reverse (431217315), we get a palindrome (5568338655).

The spelling of 5137121340 in words is "five billion, one hundred thirty-seven million, one hundred twenty-one thousand, three hundred forty".