7161261998 has 16 divisors (see below), whose sum is σ = 11917048320. Its totient is φ = 3199947000.

The previous prime is 7161261997. The next prime is 7161262033. The reversal of 7161261998 is 8991621617.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7161261997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2757278 + ... + 2759873.

It is an arithmetic number, because the mean of its divisors is an integer number (744815520).

Almost surely, 2^7161261998 is an apocalyptic number.

7161261998 is a deficient number, since it is larger than the sum of its proper divisors (4755786322).

7161261998 is a wasteful number, since it uses less digits than its factorization.

7161261998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5517223.

The product of its digits is 326592, while the sum is 50.

The square root of 7161261998 is about 84624.2400143127. The cubic root of 7161261998 is about 1927.5094722588.

The spelling of 7161261998 in words is "seven billion, one hundred sixty-one million, two hundred sixty-one thousand, nine hundred ninety-eight".