74251973642 has 32 divisors (see below), whose sum is σ = 139272981120. Its totient is φ = 28843476480.

The previous prime is 74251973639. The next prime is 74251973749. The reversal of 74251973642 is 24637915247.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 663467 + ... + 767262.

It is an arithmetic number, because the mean of its divisors is an integer number (4352280660).

Almost surely, 2^74251973642 is an apocalyptic number.

74251973642 is a deficient number, since it is larger than the sum of its proper divisors (65021007478).

74251973642 is a wasteful number, since it uses less digits than its factorization.

74251973642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1431086.

The product of its digits is 2540160, while the sum is 50.

The spelling of 74251973642 in words is "seventy-four billion, two hundred fifty-one million, nine hundred seventy-three thousand, six hundred forty-two".