145715521500 has 72 divisors (see below), whose sum is σ = 459683912688. Its totient is φ = 38857471200.

The previous prime is 145715521499. The next prime is 145715521517. The reversal of 145715521500 is 5125517541.

145715521500 is a `hidden beast` number, since 1 + 4 + 57 + 1 + 552 + 1 + 50 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16186114 + ... + 16195113.

Almost surely, 2^145715521500 is an apocalyptic number.

145715521500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145715521500 is an abundant number, since it is smaller than the sum of its proper divisors (313968391188).

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

145715521500 is a wasteful number, since it uses less digits than its factorization.

145715521500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32381252 (or 32381237 counting only the distinct ones).

The product of its (nonzero) digits is 35000, while the sum is 36.

The spelling of 145715521500 in words is "one hundred forty-five billion, seven hundred fifteen million, five hundred twenty-one thousand, five hundred".