71690749652 has 6 divisors (see below), whose sum is σ = 125458811898. Its totient is φ = 35845374824.

The previous prime is 71690749607. The next prime is 71690749667. The reversal of 71690749652 is 25694709617.

It can be written as a sum of positive squares in only one way, i.e., 49726324036 + 21964425616 = 222994^2 + 148204^2 .

It is a super-2 number, since 2×71690749652² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8961343703 + ... + 8961343710.

It is an arithmetic number, because the mean of its divisors is an integer number (20909801983).

Almost surely, 2^71690749652 is an apocalyptic number.

It is an amenable number.

71690749652 is a deficient number, since it is larger than the sum of its proper divisors (53768062246).

71690749652 is a wasteful number, since it uses less digits than its factorization.

71690749652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17922687417 (or 17922687415 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 56.

The spelling of 71690749652 in words is "seventy-one billion, six hundred ninety million, seven hundred forty-nine thousand, six hundred fifty-two".