145715521492 has 12 divisors (see below), whose sum is σ = 255008670196. Its totient is φ = 72855901440.

The previous prime is 145715521489. The next prime is 145715521493. The reversal of 145715521492 is 294125517541.

It can be written as a sum of positive squares in 2 ways, for example, as 68290232976 + 77425288516 = 261324^2 + 278254^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145715521493) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 280359 + ... + 608302.

Almost surely, 2^145715521492 is an apocalyptic number.

It is an amenable number.

145715521492 is a deficient number, since it is larger than the sum of its proper divisors (109293148704).

145715521492 is a wasteful number, since it uses less digits than its factorization.

145715521492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929658 (or 929656 counting only the distinct ones).

The product of its digits is 504000, while the sum is 46.

The spelling of 145715521492 in words is "one hundred forty-five billion, seven hundred fifteen million, five hundred twenty-one thousand, four hundred ninety-two".