745372273501 has 4 divisors (see below), whose sum is σ = 789217701372. Its totient is φ = 701526845632.

The previous prime is 745372273463. The next prime is 745372273507. The reversal of 745372273501 is 105372273547.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 105372273547 = 3947 ⋅26696801.

It can be written as a sum of positive squares in 2 ways, for example, as 596445745401 + 148926528100 = 772299^2 + 385910^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-745372273501 is a prime.

It is a super-2 number, since 2×745372273501² (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 (745372273507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21922713910 + ... + 21922713943.

It is an arithmetic number, because the mean of its divisors is an integer number (197304425343).

Almost surely, 2^745372273501 is an apocalyptic number.

It is an amenable number.

745372273501 is a deficient number, since it is larger than the sum of its proper divisors (43845427871).

745372273501 is a wasteful number, since it uses less digits than its factorization.

745372273501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43845427870.

The product of its (nonzero) digits is 1234800, while the sum is 46.

Adding to 745372273501 its sum of digits (46), we get a palindrome (745372273547).

The spelling of 745372273501 in words is "seven hundred forty-five billion, three hundred seventy-two million, two hundred seventy-three thousand, five hundred one".