745561908 has 144 divisors (see below), whose sum is σ = 2405719680. Its totient is φ = 196608384.

The previous prime is 745561903. The next prime is 745561939. The reversal of 745561908 is 809165547.

745561908 is a `hidden beast` number, since 7 + 4 + 556 + 1 + 90 + 8 = 666.

745561908 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745561903) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 84238 + ... + 92666.

Almost surely, 2^745561908 is an apocalyptic number.

745561908 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 745561908, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1202859840).

745561908 is an abundant number, since it is smaller than the sum of its proper divisors (1660157772).

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

745561908 is a wasteful number, since it uses less digits than its factorization.

745561908 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8468 (or 8454 counting only the distinct ones).

The product of its (nonzero) digits is 302400, while the sum is 45.

The square root of 745561908 is about 27304.9795458631. The cubic root of 745561908 is about 906.7646279558.

The spelling of 745561908 in words is "seven hundred forty-five million, five hundred sixty-one thousand, nine hundred eight".