154721568 has 96 divisors (see below), whose sum is σ = 427242816. Its totient is φ = 48964608.

The previous prime is 154721563. The next prime is 154721587. The reversal of 154721568 is 865127451.

It is a tau number, because it is divible by the number of its divisors (96).

It is not an unprimeable number, because it can be changed into a prime (154721563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152230 + ... + 153242.

It is an arithmetic number, because the mean of its divisors is an integer number (4450446).

Almost surely, 2^154721568 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 154721568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213621408).

154721568 is an abundant number, since it is smaller than the sum of its proper divisors (272521248).

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

154721568 is a wasteful number, since it uses less digits than its factorization.

154721568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106 (or 1098 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 154721568 is about 12438.7124735641. The cubic root of 154721568 is about 536.8466977409.

The spelling of 154721568 in words is "one hundred fifty-four million, seven hundred twenty-one thousand, five hundred sixty-eight".