78435032542 has 4 divisors (see below), whose sum is σ = 117652548816. Its totient is φ = 39217516270.

The previous prime is 78435032537. The next prime is 78435032587. The reversal of 78435032542 is 24523053487.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19608758134 + ... + 19608758137.

It is an arithmetic number, because the mean of its divisors is an integer number (29413137204).

Almost surely, 2^78435032542 is an apocalyptic number.

78435032542 is a deficient number, since it is larger than the sum of its proper divisors (39217516274).

78435032542 is a wasteful number, since it uses less digits than its factorization.

78435032542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39217516273.

The product of its (nonzero) digits is 806400, while the sum is 43.

The spelling of 78435032542 in words is "seventy-eight billion, four hundred thirty-five million, thirty-two thousand, five hundred forty-two".