78401026535 has 8 divisors (see below), whose sum is σ = 101318249760. Its totient is φ = 57896142624.

The previous prime is 78401026511. The next prime is 78401026537. The reversal of 78401026535 is 53562010487.

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

It is a cyclic number.

It is not a de Polignac number, because 78401026535 - 2¹² = 78401022439 is a prime.

It is a super-2 number, since 2×78401026535² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78401026492 and 78401026501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78401026537) 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, 603084755 + ... + 603084884.

It is an arithmetic number, because the mean of its divisors is an integer number (12664781220).

Almost surely, 2^78401026535 is an apocalyptic number.

78401026535 is a deficient number, since it is larger than the sum of its proper divisors (22917223225).

78401026535 is a wasteful number, since it uses less digits than its factorization.

78401026535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1206169657.

The product of its (nonzero) digits is 201600, while the sum is 41.

The spelling of 78401026535 in words is "seventy-eight billion, four hundred one million, twenty-six thousand, five hundred thirty-five".