145715521537 has 8 divisors (see below), whose sum is σ = 150053970176. Its totient is φ = 141420241872.

The previous prime is 145715521531. The next prime is 145715521541. The reversal of 145715521537 is 735125517541.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 145715521537 - 2³¹ = 143568037889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145715521531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10785393 + ... + 10798894.

It is an arithmetic number, because the mean of its divisors is an integer number (18756746272).

Almost surely, 2^145715521537 is an apocalyptic number.

It is an amenable number.

145715521537 is a deficient number, since it is larger than the sum of its proper divisors (4338448639).

145715521537 is a wasteful number, since it uses less digits than its factorization.

145715521537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21584487.

The product of its digits is 735000, while the sum is 46.

The spelling of 145715521537 in words is "one hundred forty-five billion, seven hundred fifteen million, five hundred twenty-one thousand, five hundred thirty-seven".