71161075251 has 48 divisors (see below), whose sum is σ = 124930750464. Its totient is φ = 38102775552.

The previous prime is 71161075243. The next prime is 71161075253. The reversal of 71161075251 is 15257016117.

It is a happy number.

71161075251 is a `hidden beast` number, since 7 + 11 + 610 + 7 + 5 + 25 + 1 = 666.

It is not a de Polignac number, because 71161075251 - 2³ = 71161075243 is a prime.

It is not an unprimeable number, because it can be changed into a prime (71161075253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 96766 + ... + 389468.

It is an arithmetic number, because the mean of its divisors is an integer number (2602723968).

Almost surely, 2^71161075251 is an apocalyptic number.

71161075251 is a deficient number, since it is larger than the sum of its proper divisors (53769675213).

71161075251 is a wasteful number, since it uses less digits than its factorization.

71161075251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292960 (or 292957 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 36.

The spelling of 71161075251 in words is "seventy-one billion, one hundred sixty-one million, seventy-five thousand, two hundred fifty-one".