78154635243 has 8 divisors (see below), whose sum is σ = 107022563728. Its totient is φ = 50694898464.

The previous prime is 78154635203. The next prime is 78154635253. The reversal of 78154635243 is 34253645187.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 78154635243 - 2⁶ = 78154635179 is a prime.

It is a super-2 number, since 2×78154635243² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78154635192 and 78154635201.

It is not an unprimeable number, because it can be changed into a prime (78154635203) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 352047796 + ... + 352048017.

It is an arithmetic number, because the mean of its divisors is an integer number (13377820466).

Almost surely, 2^78154635243 is an apocalyptic number.

78154635243 is a deficient number, since it is larger than the sum of its proper divisors (28867928485).

78154635243 is a wasteful number, since it uses less digits than its factorization.

78154635243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 704095853.

The product of its digits is 2419200, while the sum is 48.

The spelling of 78154635243 in words is "seventy-eight billion, one hundred fifty-four million, six hundred thirty-five thousand, two hundred forty-three".