745263121172 has 24 divisors (see below), whose sum is σ = 1328930881992. Its totient is φ = 365569776000.

The previous prime is 745263121171. The next prime is 745263121201. The reversal of 745263121172 is 271121362547.

It can be written as a sum of positive squares in 4 ways, for example, as 367143893776 + 378119227396 = 605924^2 + 614914^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (745263121171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2464922 + ... + 2750702.

It is an arithmetic number, because the mean of its divisors is an integer number (55372120083).

Almost surely, 2^745263121172 is an apocalyptic number.

It is an amenable number.

745263121172 is a deficient number, since it is larger than the sum of its proper divisors (583667760820).

745263121172 is a wasteful number, since it uses less digits than its factorization.

745263121172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 298139 (or 298137 counting only the distinct ones).

The product of its digits is 141120, while the sum is 41.

The spelling of 745263121172 in words is "seven hundred forty-five billion, two hundred sixty-three million, one hundred twenty-one thousand, one hundred seventy-two".