145662121554 has 16 divisors (see below), whose sum is σ = 291327984192. Its totient is φ = 48553417008.

The previous prime is 145662121543. The next prime is 145662121559. The reversal of 145662121554 is 455121266541.

It is a happy number.

It is a super-2 number, since 2×145662121554² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (145662121559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 827592 + ... + 988044.

It is an arithmetic number, because the mean of its divisors is an integer number (18207999012).

Almost surely, 2^145662121554 is an apocalyptic number.

145662121554 is an abundant number, since it is smaller than the sum of its proper divisors (145665862638).

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

145662121554 is a wasteful number, since it uses less digits than its factorization.

145662121554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 311761.

The product of its digits is 288000, while the sum is 42.

The spelling of 145662121554 in words is "one hundred forty-five billion, six hundred sixty-two million, one hundred twenty-one thousand, five hundred fifty-four".