75121552961 has 8 divisors (see below), whose sum is σ = 92457296064. Its totient is φ = 59436833040.

The previous prime is 75121552951. The next prime is 75121552967. The reversal of 75121552961 is 16925512157.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-75121552961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75121552967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 412755695 + ... + 412755876.

It is an arithmetic number, because the mean of its divisors is an integer number (11557162008).

Almost surely, 2^75121552961 is an apocalyptic number.

It is an amenable number.

75121552961 is a deficient number, since it is larger than the sum of its proper divisors (17335743103).

75121552961 is a wasteful number, since it uses less digits than its factorization.

75121552961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 825511591.

The product of its digits is 189000, while the sum is 44.

The spelling of 75121552961 in words is "seventy-five billion, one hundred twenty-one million, five hundred fifty-two thousand, nine hundred sixty-one".