145721507731533 has 48 divisors (see below), whose sum is σ = 211171371840000. Its totient is φ = 96832120550400.

The previous prime is 145721507731493. The next prime is 145721507731567. The reversal of 145721507731533 is 335137705127541.

145721507731533 is a `hidden beast` number, since 1 + 4 + 5 + 7 + 2 + 1 + 5 + 0 + 77 + 31 + 533 = 666.

It is not a de Polignac number, because 145721507731533 - 2¹⁴ = 145721507715149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 145721507731533.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145721507631533) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 28567240683 + ... + 28567245783.

It is an arithmetic number, because the mean of its divisors is an integer number (4399403580000).

Almost surely, 2^{145721507731533} is an apocalyptic number.

It is an amenable number.

145721507731533 is a deficient number, since it is larger than the sum of its proper divisors (65449864108467).

145721507731533 is a wasteful number, since it uses less digits than its factorization.

145721507731533 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11162 (or 11159 counting only the distinct ones).

The product of its (nonzero) digits is 9261000, while the sum is 54.

The spelling of 145721507731533 in words is "one hundred forty-five trillion, seven hundred twenty-one billion, five hundred seven million, seven hundred thirty-one thousand, five hundred thirty-three".