742744751887 has 4 divisors (see below), whose sum is σ = 742755554856. Its totient is φ = 742733948920.

The previous prime is 742744751857. The next prime is 742744751897. The reversal of 742744751887 is 788157447247.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-742744751887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742744751857) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5297689 + ... + 5436082.

It is an arithmetic number, because the mean of its divisors is an integer number (185688888714).

Almost surely, 2^742744751887 is an apocalyptic number.

742744751887 is a deficient number, since it is larger than the sum of its proper divisors (10802969).

742744751887 is a wasteful number, since it uses less digits than its factorization.

742744751887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10802968.

The product of its digits is 98344960, while the sum is 64.

The spelling of 742744751887 in words is "seven hundred forty-two billion, seven hundred forty-four million, seven hundred fifty-one thousand, eight hundred eighty-seven".