71490665501 has 4 divisors (see below), whose sum is σ = 72036395904. Its totient is φ = 70944935100.

The previous prime is 71490665473. The next prime is 71490665537. The reversal of 71490665501 is 10556609417.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 71490665501 - 2²⁶ = 71423556637 is a prime.

It is a super-2 number, since 2×71490665501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71490665551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 272865005 + ... + 272865266.

It is an arithmetic number, because the mean of its divisors is an integer number (18009098976).

Almost surely, 2^71490665501 is an apocalyptic number.

It is an amenable number.

71490665501 is a deficient number, since it is larger than the sum of its proper divisors (545730403).

71490665501 is a wasteful number, since it uses less digits than its factorization.

71490665501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 545730402.

The product of its (nonzero) digits is 226800, while the sum is 44.

The spelling of 71490665501 in words is "seventy-one billion, four hundred ninety million, six hundred sixty-five thousand, five hundred one".