74642543786 has 8 divisors (see below), whose sum is σ = 111982361664. Its totient is φ = 37315089900.

The previous prime is 74642543771. The next prime is 74642543797. The reversal of 74642543786 is 68734524647.

It is a happy number.

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

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, 3075890 + ... + 3100061.

It is an arithmetic number, because the mean of its divisors is an integer number (13997795208).

Almost surely, 2^74642543786 is an apocalyptic number.

74642543786 is a deficient number, since it is larger than the sum of its proper divisors (37339817878).

74642543786 is a wasteful number, since it uses less digits than its factorization.

74642543786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6181996.

The product of its digits is 27095040, while the sum is 56.

The spelling of 74642543786 in words is "seventy-four billion, six hundred forty-two million, five hundred forty-three thousand, seven hundred eighty-six".