7161525991 has 2 divisors, whose sum is σ = 7161525992. Its totient is φ = 7161525990.

The previous prime is 7161525983. The next prime is 7161526027. The reversal of 7161525991 is 1995251617.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 7161525991 - 2³ = 7161525983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (7161523991) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3580762995 + 3580762996.

It is an arithmetic number, because the mean of its divisors is an integer number (3580762996).

Almost surely, 2^7161525991 is an apocalyptic number.

7161525991 is a deficient number, since it is larger than the sum of its proper divisors (1).

7161525991 is an equidigital number, since it uses as much as digits as its factorization.

7161525991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 170100, while the sum is 46.

The square root of 7161525991 is about 84625.7997953343. The cubic root of 7161525991 is about 1927.5331572255.

The spelling of 7161525991 in words is "seven billion, one hundred sixty-one million, five hundred twenty-five thousand, nine hundred ninety-one".