745276227661 has 8 divisors (see below), whose sum is σ = 851750961920. Its totient is φ = 638803168848.

The previous prime is 745276227637. The next prime is 745276227677. The reversal of 745276227661 is 166722672547.

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

It is a cyclic number.

It is not a de Polignac number, because 745276227661 - 2⁹ = 745276227149 is a prime.

It is a super-2 number, since 2×745276227661² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745276227691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 752860 + ... + 1434346.

It is an arithmetic number, because the mean of its divisors is an integer number (106468870240).

Almost surely, 2^745276227661 is an apocalyptic number.

It is an amenable number.

745276227661 is a deficient number, since it is larger than the sum of its proper divisors (106474734259).

745276227661 is a wasteful number, since it uses less digits than its factorization.

745276227661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 837723.

The product of its digits is 11854080, while the sum is 55.

The spelling of 745276227661 in words is "seven hundred forty-five billion, two hundred seventy-six million, two hundred twenty-seven thousand, six hundred sixty-one".