145565320077 has 24 divisors (see below), whose sum is σ = 218492732640. Its totient is φ = 96845822640.

The previous prime is 145565320067. The next prime is 145565320081. The reversal of 145565320077 is 770023565541.

It is a happy number.

145565320077 is a `hidden beast` number, since 1 + 4 + 556 + 5 + 3 + 20 + 0 + 77 = 666.

It is not a de Polignac number, because 145565320077 - 2¹⁸ = 145565057933 is a prime.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145565320067) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 490702 + ... + 729327.

It is an arithmetic number, because the mean of its divisors is an integer number (9103863860).

Almost surely, 2^145565320077 is an apocalyptic number.

It is an amenable number.

145565320077 is a deficient number, since it is larger than the sum of its proper divisors (72927412563).

145565320077 is an equidigital number, since it uses as much as digits as its factorization.

145565320077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1220535 (or 1220523 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 45.

The spelling of 145565320077 in words is "one hundred forty-five billion, five hundred sixty-five million, three hundred twenty thousand, seventy-seven".