145851514969 has 4 divisors (see below), whose sum is σ = 149793447844. Its totient is φ = 141909582096.

The previous prime is 145851514967. The next prime is 145851514999. The reversal of 145851514969 is 969415158541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 969415158541 = 59 ⋅16430765399.

It can be written as a sum of positive squares in 2 ways, for example, as 139457433600 + 6394081369 = 373440^2 + 79963^2 .

It is a cyclic number.

It is not a de Polignac number, because 145851514969 - 2¹ = 145851514967 is a prime.

It is a super-2 number, since 2×145851514969² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145851514967) 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, 1970966382 + ... + 1970966455.

It is an arithmetic number, because the mean of its divisors is an integer number (37448361961).

Almost surely, 2^145851514969 is an apocalyptic number.

It is an amenable number.

145851514969 is a deficient number, since it is larger than the sum of its proper divisors (3941932875).

145851514969 is an equidigital number, since it uses as much as digits as its factorization.

145851514969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3941932874.

The product of its digits is 7776000, while the sum is 58.

The spelling of 145851514969 in words is "one hundred forty-five billion, eight hundred fifty-one million, five hundred fourteen thousand, nine hundred sixty-nine".