71552121773 has 32 divisors (see below), whose sum is σ = 81787926528. Its totient is φ = 62020123200.

The previous prime is 71552121703. The next prime is 71552121787. The reversal of 71552121773 is 37712125517.

It is a cyclic number.

It is not a de Polignac number, because 71552121773 - 2⁸ = 71552121517 is a prime.

It is a super-2 number, since 2×71552121773² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 71552121773.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71552121703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4818386 + ... + 4833212.

It is an arithmetic number, because the mean of its divisors is an integer number (2555872704).

Almost surely, 2^71552121773 is an apocalyptic number.

It is an amenable number.

71552121773 is a deficient number, since it is larger than the sum of its proper divisors (10235804755).

71552121773 is a wasteful number, since it uses less digits than its factorization.

71552121773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15113.

The product of its digits is 102900, while the sum is 41.

The spelling of 71552121773 in words is "seventy-one billion, five hundred fifty-two million, one hundred twenty-one thousand, seven hundred seventy-three".