745721580 has 24 divisors (see below), whose sum is σ = 2088020592. Its totient is φ = 198859072.

The previous prime is 745721563. The next prime is 745721597. The reversal of 745721580 is 85127547.

It is an interprime number because it is at equal distance from previous prime (745721563) and next prime (745721597).

It is a super-2 number, since 2×745721580² = 1112201349755392800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6214287 + ... + 6214406.

It is an arithmetic number, because the mean of its divisors is an integer number (87000858).

Almost surely, 2^745721580 is an apocalyptic number.

It is an amenable number.

745721580 is an abundant number, since it is smaller than the sum of its proper divisors (1342299012).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

745721580 is a wasteful number, since it uses less digits than its factorization.

745721580 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12428705 (or 12428703 counting only the distinct ones).

The product of its (nonzero) digits is 78400, while the sum is 39.

The square root of 745721580 is about 27307.9032516230. The cubic root of 745721580 is about 906.8293552375.

The spelling of 745721580 in words is "seven hundred forty-five million, seven hundred twenty-one thousand, five hundred eighty".