71550736490 has 8 divisors (see below), whose sum is σ = 128791325700. Its totient is φ = 28620294592.

The previous prime is 71550736483. The next prime is 71550736511. The reversal of 71550736490 is 9463705517.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 67392679201 + 4158057289 = 259601^2 + 64483^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×71550736490² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3577536815 + ... + 3577536834.

Almost surely, 2^71550736490 is an apocalyptic number.

71550736490 is a deficient number, since it is larger than the sum of its proper divisors (57240589210).

71550736490 is a wasteful number, since it uses less digits than its factorization.

71550736490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7155073656.

The product of its (nonzero) digits is 793800, while the sum is 47.

The spelling of 71550736490 in words is "seventy-one billion, five hundred fifty million, seven hundred thirty-six thousand, four hundred ninety".