78283642772 has 48 divisors (see below), whose sum is σ = 139875821568. Its totient is φ = 38329603200.

The previous prime is 78283642727. The next prime is 78283642783. The reversal of 78283642772 is 27724638287.

It is a super-2 number, since 2×78283642772² (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 15 ways as a sum of consecutive naturals, for example, 17801678 + ... + 17806074.

It is an arithmetic number, because the mean of its divisors is an integer number (2914079616).

Almost surely, 2^78283642772 is an apocalyptic number.

It is an amenable number.

78283642772 is a deficient number, since it is larger than the sum of its proper divisors (61592178796).

78283642772 is a wasteful number, since it uses less digits than its factorization.

78283642772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4976 (or 4974 counting only the distinct ones).

The product of its digits is 12644352, while the sum is 56.

The spelling of 78283642772 in words is "seventy-eight billion, two hundred eighty-three million, six hundred forty-two thousand, seven hundred seventy-two".