743768521642 has 8 divisors (see below), whose sum is σ = 1115793440676. Its totient is φ = 371837374752.

The previous prime is 743768521633. The next prime is 743768521697. The reversal of 743768521642 is 246125867347.

It can be written as a sum of positive squares in 2 ways, for example, as 714040210081 + 29728311561 = 845009^2 + 172419^2 .

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

It is a super-3 number, since 3×743768521642³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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, 23423203 + ... + 23454934.

Almost surely, 2^743768521642 is an apocalyptic number.

743768521642 is a deficient number, since it is larger than the sum of its proper divisors (372024919034).

743768521642 is a wasteful number, since it uses less digits than its factorization.

743768521642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46886072.

The product of its digits is 13547520, while the sum is 55.

The spelling of 743768521642 in words is "seven hundred forty-three billion, seven hundred sixty-eight million, five hundred twenty-one thousand, six hundred forty-two".