145621016544 has 24 divisors (see below), whose sum is σ = 382255168680. Its totient is φ = 48540338816.

The previous prime is 145621016539. The next prime is 145621016579. The reversal of 145621016544 is 445610126541.

It is a tau number, because it is divible by the number of its divisors (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 758442699 + ... + 758442890.

It is an arithmetic number, because the mean of its divisors is an integer number (15927298695).

Almost surely, 2^145621016544 is an apocalyptic number.

It is an amenable number.

145621016544 is an abundant number, since it is smaller than the sum of its proper divisors (236634152136).

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

145621016544 is a wasteful number, since it uses less digits than its factorization.

145621016544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516885602 (or 1516885594 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

The spelling of 145621016544 in words is "one hundred forty-five billion, six hundred twenty-one million, sixteen thousand, five hundred forty-four".