749474411781 has 4 divisors (see below), whose sum is σ = 999299215712. Its totient is φ = 499649607852.

The previous prime is 749474411753. The next prime is 749474411783. The reversal of 749474411781 is 187114474947.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 749474411781 - 2⁹ = 749474411269 is a prime.

It is a super-2 number, since 2×749474411781² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a partition number, being equal to the number of ways a set of 181 identical objects can be partitioned into subset.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749474411783) 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, 124912401961 + ... + 124912401966.

It is an arithmetic number, because the mean of its divisors is an integer number (249824803928).

Almost surely, 2^749474411781 is an apocalyptic number.

It is an amenable number.

749474411781 is a deficient number, since it is larger than the sum of its proper divisors (249824803931).

749474411781 is a wasteful number, since it uses less digits than its factorization.

749474411781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 249824803930.

The product of its digits is 6322176, while the sum is 57.

The spelling of 749474411781 in words is "seven hundred forty-nine billion, four hundred seventy-four million, four hundred eleven thousand, seven hundred eighty-one".