78751403075855 has 4 divisors (see below), whose sum is σ = 94501683691032. Its totient is φ = 63001122460680.

The previous prime is 78751403075809. The next prime is 78751403075923. The reversal of 78751403075855 is 55857030415787.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-78751403075855 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 78751403075791 and 78751403075800.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7875140307581 + ... + 7875140307590.

It is an arithmetic number, because the mean of its divisors is an integer number (23625420922758).

Almost surely, 2^{78751403075855} is an apocalyptic number.

78751403075855 is a deficient number, since it is larger than the sum of its proper divisors (15750280615177).

78751403075855 is a wasteful number, since it uses less digits than its factorization.

78751403075855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15750280615176.

The product of its (nonzero) digits is 164640000, while the sum is 65.

The spelling of 78751403075855 in words is "seventy-eight trillion, seven hundred fifty-one billion, four hundred three million, seventy-five thousand, eight hundred fifty-five".