78535510420457 has 8 divisors (see below), whose sum is σ = 78601583231040. Its totient is φ = 78469458290640.

The previous prime is 78535510420441. The next prime is 78535510420531. The reversal of 78535510420457 is 75402401553587.

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 78535510420457 - 2⁴ = 78535510420441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (78535510425457) 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, 2432732 + ... + 12766722.

It is an arithmetic number, because the mean of its divisors is an integer number (9825197903880).

Almost surely, 2^{78535510420457} is an apocalyptic number.

It is an amenable number.

78535510420457 is a deficient number, since it is larger than the sum of its proper divisors (66072810583).

78535510420457 is a wasteful number, since it uses less digits than its factorization.

78535510420457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10340383.

The product of its (nonzero) digits is 23520000, while the sum is 56.

The spelling of 78535510420457 in words is "seventy-eight trillion, five hundred thirty-five billion, five hundred ten million, four hundred twenty thousand, four hundred fifty-seven".