145178047501 has 4 divisors (see below), whose sum is σ = 150184187100. Its totient is φ = 140171907904.

The previous prime is 145178047493. The next prime is 145178047523. The reversal of 145178047501 is 105740871541.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 90255781476 + 54922266025 = 300426^2 + 234355^2 .

It is a cyclic number.

It is not a de Polignac number, because 145178047501 - 2³ = 145178047493 is a prime.

It is a super-2 number, since 2×145178047501² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145178047561) 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, 2503069756 + ... + 2503069813.

It is an arithmetic number, because the mean of its divisors is an integer number (37546046775).

Almost surely, 2^145178047501 is an apocalyptic number.

It is an amenable number.

145178047501 is a deficient number, since it is larger than the sum of its proper divisors (5006139599).

145178047501 is an equidigital number, since it uses as much as digits as its factorization.

145178047501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5006139598.

The product of its (nonzero) digits is 156800, while the sum is 43.

The spelling of 145178047501 in words is "one hundred forty-five billion, one hundred seventy-eight million, forty-seven thousand, five hundred one".