742744751885 has 4 divisors (see below), whose sum is σ = 891293702268. Its totient is φ = 594195801504.

The previous prime is 742744751857. The next prime is 742744751897. The reversal of 742744751885 is 588157447247.

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

It can be written as a sum of positive squares in 2 ways, for example, as 481111478884 + 261633273001 = 693622^2 + 511501^2 .

It is a cyclic number.

It is not a de Polignac number, because 742744751885 - 2¹⁸ = 742744489741 is a prime.

It is a super-2 number, since 2×742744751885² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74274475184 + ... + 74274475193.

It is an arithmetic number, because the mean of its divisors is an integer number (222823425567).

Almost surely, 2^742744751885 is an apocalyptic number.

It is an amenable number.

742744751885 is a deficient number, since it is larger than the sum of its proper divisors (148548950383).

742744751885 is a wasteful number, since it uses less digits than its factorization.

742744751885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 148548950382.

The product of its digits is 70246400, while the sum is 62.

The spelling of 742744751885 in words is "seven hundred forty-two billion, seven hundred forty-four million, seven hundred fifty-one thousand, eight hundred eighty-five".