145531261064 has 48 divisors (see below), whose sum is σ = 334127912400. Its totient is φ = 59087877408.

The previous prime is 145531261009. The next prime is 145531261069. The reversal of 145531261064 is 460162135541.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is not an unprimeable number, because it can be changed into a prime (145531261069) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9762374 + ... + 9777269.

It is an arithmetic number, because the mean of its divisors is an integer number (6960998175).

Almost surely, 2^145531261064 is an apocalyptic number.

145531261064 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

145531261064 is an abundant number, since it is smaller than the sum of its proper divisors (188596651336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145531261064 is a wasteful number, since it uses less digits than its factorization.

145531261064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19539682 (or 19539671 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 145531261064 in words is "one hundred forty-five billion, five hundred thirty-one million, two hundred sixty-one thousand, sixty-four".