745111712421 has 24 divisors (see below), whose sum is σ = 1111698781440. Its totient is φ = 480410956800.

The previous prime is 745111712381. The next prime is 745111712459. The reversal of 745111712421 is 124217111547.

745111712421 is a `hidden beast` number, since 7 + 4 + 511 + 17 + 124 + 2 + 1 = 666.

It is not a de Polignac number, because 745111712421 - 2²⁷ = 744977494693 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745111712021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 411676 + ... + 1288293.

It is an arithmetic number, because the mean of its divisors is an integer number (46320782560).

Almost surely, 2^745111712421 is an apocalyptic number.

It is an amenable number.

745111712421 is a deficient number, since it is larger than the sum of its proper divisors (366587069019).

745111712421 is a wasteful number, since it uses less digits than its factorization.

745111712421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1701577 (or 1701574 counting only the distinct ones).

The product of its digits is 15680, while the sum is 36.

Adding to 745111712421 its reverse (124217111547), we get a palindrome (869328823968).

The spelling of 745111712421 in words is "seven hundred forty-five billion, one hundred eleven million, seven hundred twelve thousand, four hundred twenty-one".