145447650247 has 4 divisors (see below), whose sum is σ = 146494036360. Its totient is φ = 144401264136.

The previous prime is 145447650241. The next prime is 145447650251. The reversal of 145447650247 is 742056744541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 742056744541 = 7 ⋅106008106363.

It is a cyclic number.

It is not a de Polignac number, because 145447650247 - 2³ = 145447650239 is a prime.

It is a super-2 number, since 2×145447650247² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 145447650247.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145447650241) 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, 523192848 + ... + 523193125.

It is an arithmetic number, because the mean of its divisors is an integer number (36623509090).

Almost surely, 2^145447650247 is an apocalyptic number.

145447650247 is a deficient number, since it is larger than the sum of its proper divisors (1046386113).

145447650247 is a wasteful number, since it uses less digits than its factorization.

145447650247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1046386112.

The product of its (nonzero) digits is 3763200, while the sum is 49.

The spelling of 145447650247 in words is "one hundred forty-five billion, four hundred forty-seven million, six hundred fifty thousand, two hundred forty-seven".