145427538686 has 4 divisors (see below), whose sum is σ = 218141308032. Its totient is φ = 72713769342.

The previous prime is 145427538647. The next prime is 145427538689. The reversal of 145427538686 is 686835724541.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 686835724541 = 107 ⋅6419025463.

It is a super-2 number, since 2×145427538686² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145427538689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36356884670 + ... + 36356884673.

It is an arithmetic number, because the mean of its divisors is an integer number (54535327008).

Almost surely, 2^145427538686 is an apocalyptic number.

145427538686 is a deficient number, since it is larger than the sum of its proper divisors (72713769346).

145427538686 is an equidigital number, since it uses as much as digits as its factorization.

145427538686 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72713769345.

The product of its digits is 38707200, while the sum is 59.

The spelling of 145427538686 in words is "one hundred forty-five billion, four hundred twenty-seven million, five hundred thirty-eight thousand, six hundred eighty-six".