78298128441 has 20 divisors (see below), whose sum is σ = 125961093412. Its totient is φ = 48183463008.

The previous prime is 78298128431. The next prime is 78298128463. The reversal of 78298128441 is 14482189287.

78298128441 is a `hidden beast` number, since 78 + 2 + 9 + 8 + 128 + 441 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38937155625 + 39360972816 = 197325^2 + 198396^2 .

It is not a de Polignac number, because 78298128441 - 2¹⁹ = 78297604153 is a prime.

It is a super-2 number, since 2×78298128441² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78298128431) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 37177546 + ... + 37179651.

Almost surely, 2^78298128441 is an apocalyptic number.

It is an amenable number.

78298128441 is a deficient number, since it is larger than the sum of its proper divisors (47662964971).

78298128441 is a wasteful number, since it uses less digits than its factorization.

78298128441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74357222 (or 74357213 counting only the distinct ones).

The product of its digits is 2064384, while the sum is 54.

The spelling of 78298128441 in words is "seventy-eight billion, two hundred ninety-eight million, one hundred twenty-eight thousand, four hundred forty-one".