78298128435 has 16 divisors (see below), whose sum is σ = 126786369024. Its totient is φ = 41255880672.

The previous prime is 78298128431. The next prime is 78298128463. The reversal of 78298128435 is 53482189287.

It is not a de Polignac number, because 78298128435 - 2² = 78298128431 is a prime.

It is a super-2 number, since 2×78298128435² (a number of 23 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 31443787 + ... + 31446276.

It is an arithmetic number, because the mean of its divisors is an integer number (7924148064).

Almost surely, 2^78298128435 is an apocalyptic number.

78298128435 is a deficient number, since it is larger than the sum of its proper divisors (48488240589).

78298128435 is a wasteful number, since it uses less digits than its factorization.

78298128435 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62890154.

The product of its digits is 7741440, while the sum is 57.

The spelling of 78298128435 in words is "seventy-eight billion, two hundred ninety-eight million, one hundred twenty-eight thousand, four hundred thirty-five".