7261137157 has 2 divisors, whose sum is σ = 7261137158. Its totient is φ = 7261137156.

The previous prime is 7261137077. The next prime is 7261137181. The reversal of 7261137157 is 7517311627.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5370104961 + 1891032196 = 73281^2 + 43486^2 .

It is a cyclic number.

It is not a de Polignac number, because 7261137157 - 2²³ = 7252748549 is a prime.

It is a super-2 number, since 2×7261137157² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7261135157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3630568578 + 3630568579.

It is an arithmetic number, because the mean of its divisors is an integer number (3630568579).

Almost surely, 2^7261137157 is an apocalyptic number.

It is an amenable number.

7261137157 is a deficient number, since it is larger than the sum of its proper divisors (1).

7261137157 is an equidigital number, since it uses as much as digits as its factorization.

7261137157 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 61740, while the sum is 40.

The square root of 7261137157 is about 85212.3063706176. The cubic root of 7261137157 is about 1936.4288606540.

The spelling of 7261137157 in words is "seven billion, two hundred sixty-one million, one hundred thirty-seven thousand, one hundred fifty-seven".