1545011749 has 2 divisors, whose sum is σ = 1545011750. Its totient is φ = 1545011748.

The previous prime is 1545011719. The next prime is 1545011753. The reversal of 1545011749 is 9471105451.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 847101025 + 697910724 = 29105^2 + 26418^2 .

It is a cyclic number.

It is not a de Polignac number, because 1545011749 - 2¹³ = 1545003557 is a prime.

It is a super-2 number, since 2×1545011749² = 4774122609096078002, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1545011719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 772505874 + 772505875.

It is an arithmetic number, because the mean of its divisors is an integer number (772505875).

Almost surely, 2^1545011749 is an apocalyptic number.

It is an amenable number.

1545011749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1545011749 is an equidigital number, since it uses as much as digits as its factorization.

1545011749 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25200, while the sum is 37.

The square root of 1545011749 is about 39306.6374674812. The cubic root of 1545011749 is about 1156.0517144703.

The spelling of 1545011749 in words is "one billion, five hundred forty-five million, eleven thousand, seven hundred forty-nine".