78298117572 has 12 divisors (see below), whose sum is σ = 182695607696. Its totient is φ = 26099372520.

The previous prime is 78298117571. The next prime is 78298117577. The reversal of 78298117572 is 27571189287.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×78298117572² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78298117571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3262421554 + ... + 3262421577.

Almost surely, 2^78298117572 is an apocalyptic number.

It is an amenable number.

78298117572 is an abundant number, since it is smaller than the sum of its proper divisors (104397490124).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

78298117572 is a wasteful number, since it uses less digits than its factorization.

78298117572 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6524843138 (or 6524843136 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 57.

The spelling of 78298117572 in words is "seventy-eight billion, two hundred ninety-eight million, one hundred seventeen thousand, five hundred seventy-two".