250145727749 has 2 divisors, whose sum is σ = 250145727750. Its totient is φ = 250145727748.

The previous prime is 250145727737. The next prime is 250145727781. The reversal of 250145727749 is 947727541052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 130805188900 + 119340538849 = 361670^2 + 345457^2 .

It is a cyclic number.

It is not a de Polignac number, because 250145727749 - 2⁸ = 250145727493 is a prime.

It is a super-2 number, since 2×250145727749² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 250145727749.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (250145727709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125072863874 + 125072863875.

It is an arithmetic number, because the mean of its divisors is an integer number (125072863875).

Almost surely, 2^250145727749 is an apocalyptic number.

It is an amenable number.

250145727749 is a deficient number, since it is larger than the sum of its proper divisors (1).

250145727749 is an equidigital number, since it uses as much as digits as its factorization.

250145727749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4939200, while the sum is 53.

The spelling of 250145727749 in words is "two hundred fifty billion, one hundred forty-five million, seven hundred twenty-seven thousand, seven hundred forty-nine".