145639415987 has 16 divisors (see below), whose sum is σ = 161953650432. Its totient is φ = 130058127360.

The previous prime is 145639415981. The next prime is 145639416001. The reversal of 145639415987 is 789514936541.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-145639415987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (145639415981) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1240283 + ... + 1352619.

It is an arithmetic number, because the mean of its divisors is an integer number (10122103152).

Almost surely, 2^145639415987 is an apocalyptic number.

145639415987 is a deficient number, since it is larger than the sum of its proper divisors (16314234445).

145639415987 is a wasteful number, since it uses less digits than its factorization.

145639415987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115598.

The product of its digits is 32659200, while the sum is 62.

The spelling of 145639415987 in words is "one hundred forty-five billion, six hundred thirty-nine million, four hundred fifteen thousand, nine hundred eighty-seven".