71982471783766 has 8 divisors (see below), whose sum is σ = 113656534395480. Its totient is φ = 34096960318608.

The previous prime is 71982471783749. The next prime is 71982471783821. The reversal of 71982471783766 is 66738717428917.

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

It is a super-2 number, since 2×71982471783766² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71982471783692 and 71982471783701.

It is a congruent 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, 947137786591 + ... + 947137786666.

It is an arithmetic number, because the mean of its divisors is an integer number (14207066799435).

Almost surely, 2^{71982471783766} is an apocalyptic number.

71982471783766 is a deficient number, since it is larger than the sum of its proper divisors (41674062611714).

71982471783766 is a wasteful number, since it uses less digits than its factorization.

71982471783766 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1894275573278.

The product of its digits is 1194891264, while the sum is 76.

The spelling of 71982471783766 in words is "seventy-one trillion, nine hundred eighty-two billion, four hundred seventy-one million, seven hundred eighty-three thousand, seven hundred sixty-six".