71120397747 has 16 divisors (see below), whose sum is σ = 108397329920. Its totient is φ = 40631455872.

The previous prime is 71120397743. The next prime is 71120397779. The reversal of 71120397747 is 74779302117.

It is not a de Polignac number, because 71120397747 - 2² = 71120397743 is a prime.

It is a super-2 number, since 2×71120397747² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71120397696 and 71120397705.

It is not an unprimeable number, because it can be changed into a prime (71120397743) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 265222 + ... + 461067.

It is an arithmetic number, because the mean of its divisors is an integer number (6774833120).

Almost surely, 2^71120397747 is an apocalyptic number.

71120397747 is a deficient number, since it is larger than the sum of its proper divisors (37276932173).

71120397747 is a wasteful number, since it uses less digits than its factorization.

71120397747 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 730962.

The product of its (nonzero) digits is 518616, while the sum is 48.

The spelling of 71120397747 in words is "seventy-one billion, one hundred twenty million, three hundred ninety-seven thousand, seven hundred forty-seven".