5136721942 has 32 divisors (see below), whose sum is σ = 8531246880. Its totient is φ = 2300037120.

The previous prime is 5136721939. The next prime is 5136721943. The reversal of 5136721942 is 2491276315.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 5136721895 and 5136721904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5136721943) 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, 1811758 + ... + 1814590.

It is an arithmetic number, because the mean of its divisors is an integer number (266601465).

Almost surely, 2^5136721942 is an apocalyptic number.

5136721942 is a deficient number, since it is larger than the sum of its proper divisors (3394524938).

5136721942 is a wasteful number, since it uses less digits than its factorization.

5136721942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4048.

The product of its digits is 90720, while the sum is 40.

The square root of 5136721942 is about 71670.9281508200. The cubic root of 5136721942 is about 1725.4220844328.

The spelling of 5136721942 in words is "five billion, one hundred thirty-six million, seven hundred twenty-one thousand, nine hundred forty-two".