145213405440521 has 64 divisors (see below), whose sum is σ = 177821341562880. Its totient is φ = 116869196989440.

The previous prime is 145213405440491. The next prime is 145213405440539. The reversal of 145213405440521 is 125044504312541.

It is a cyclic number.

It is not a de Polignac number, because 145213405440521 - 2¹⁴ = 145213405424137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145213405440581) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 456540086 + ... + 456858048.

It is an arithmetic number, because the mean of its divisors is an integer number (2778458461920).

Almost surely, 2^{145213405440521} is an apocalyptic number.

145213405440521 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

145213405440521 is a deficient number, since it is larger than the sum of its proper divisors (32607936122359).

145213405440521 is a wasteful number, since it uses less digits than its factorization.

145213405440521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318926.

The product of its (nonzero) digits is 384000, while the sum is 41.

The spelling of 145213405440521 in words is "one hundred forty-five trillion, two hundred thirteen billion, four hundred five million, four hundred forty thousand, five hundred twenty-one".