745727512261 has 2 divisors, whose sum is σ = 745727512262. Its totient is φ = 745727512260.

The previous prime is 745727512253. The next prime is 745727512289. The reversal of 745727512261 is 162215727547.

It is a happy number.

745727512261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 739782331236 + 5945181025 = 860106^2 + 77105^2 .

It is a cyclic number.

It is not a de Polignac number, because 745727512261 - 2³ = 745727512253 is a prime.

It is a super-2 number, since 2×745727512261² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (745727552261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 372863756130 + 372863756131.

It is an arithmetic number, because the mean of its divisors is an integer number (372863756131).

Almost surely, 2^745727512261 is an apocalyptic number.

It is an amenable number.

745727512261 is a deficient number, since it is larger than the sum of its proper divisors (1).

745727512261 is an equidigital number, since it uses as much as digits as its factorization.

745727512261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1646400, while the sum is 49.

The spelling of 745727512261 in words is "seven hundred forty-five billion, seven hundred twenty-seven million, five hundred twelve thousand, two hundred sixty-one".