78840617582 has 8 divisors (see below), whose sum is σ = 118262171352. Its totient is φ = 39419893800.

The previous prime is 78840617573. The next prime is 78840617621. The reversal of 78840617582 is 28571604887.

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

It is a super-2 number, since 2×78840617582² (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 in 3 ways as a sum of consecutive naturals, for example, 160532 + ... + 428312.

It is an arithmetic number, because the mean of its divisors is an integer number (14782771419).

Almost surely, 2^78840617582 is an apocalyptic number.

78840617582 is a deficient number, since it is larger than the sum of its proper divisors (39421553770).

78840617582 is a wasteful number, since it uses less digits than its factorization.

78840617582 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 414994.

The product of its (nonzero) digits is 6021120, while the sum is 56.

The spelling of 78840617582 in words is "seventy-eight billion, eight hundred forty million, six hundred seventeen thousand, five hundred eighty-two".