71626649351 has 4 divisors (see below), whose sum is σ = 71947845312. Its totient is φ = 71305453392.

The previous prime is 71626649257. The next prime is 71626649359. The reversal of 71626649351 is 15394662617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15394662617 = 883 ⋅17434499.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71626649351 is a prime.

It is a super-2 number, since 2×71626649351² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 71626649351.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71626649359) 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, 160597646 + ... + 160598091.

It is an arithmetic number, because the mean of its divisors is an integer number (17986961328).

Almost surely, 2^71626649351 is an apocalyptic number.

71626649351 is a deficient number, since it is larger than the sum of its proper divisors (321195961).

71626649351 is a wasteful number, since it uses less digits than its factorization.

71626649351 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 321195960.

The product of its digits is 1632960, while the sum is 50.

The spelling of 71626649351 in words is "seventy-one billion, six hundred twenty-six million, six hundred forty-nine thousand, three hundred fifty-one".