78298390652 has 6 divisors (see below), whose sum is σ = 137022183648. Its totient is φ = 39149195324.

The previous prime is 78298390649. The next prime is 78298390663. The reversal of 78298390652 is 25609389287.

It is a super-2 number, since 2×78298390652² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78298390591 and 78298390600.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9787298828 + ... + 9787298835.

It is an arithmetic number, because the mean of its divisors is an integer number (22837030608).

Almost surely, 2^78298390652 is an apocalyptic number.

It is an amenable number.

78298390652 is a deficient number, since it is larger than the sum of its proper divisors (58723792996).

78298390652 is a wasteful number, since it uses less digits than its factorization.

78298390652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19574597667 (or 19574597665 counting only the distinct ones).

The product of its (nonzero) digits is 13063680, while the sum is 59.

The spelling of 78298390652 in words is "seventy-eight billion, two hundred ninety-eight million, three hundred ninety thousand, six hundred fifty-two".