7157881071 has 12 divisors (see below), whose sum is σ = 11279085480. Its totient is φ = 4338109680.

The previous prime is 7157881069. The next prime is 7157881079. The reversal of 7157881071 is 1701887517.

7157881071 is a `hidden beast` number, since 7 + 1 + 578 + 8 + 1 + 0 + 71 = 666.

It is not a de Polignac number, because 7157881071 - 2¹ = 7157881069 is a prime.

It is a super-2 number, since 2×7157881071² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7157881079) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36150816 + ... + 36151013.

It is an arithmetic number, because the mean of its divisors is an integer number (939923790).

Almost surely, 2^7157881071 is an apocalyptic number.

7157881071 is a deficient number, since it is larger than the sum of its proper divisors (4121204409).

7157881071 is a wasteful number, since it uses less digits than its factorization.

7157881071 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72301846 (or 72301843 counting only the distinct ones).

The product of its (nonzero) digits is 109760, while the sum is 45.

The square root of 7157881071 is about 84604.2615416032. The cubic root of 7157881071 is about 1927.2060902274.

The spelling of 7157881071 in words is "seven billion, one hundred fifty-seven million, eight hundred eighty-one thousand, seventy-one".