145927899987 has 4 divisors (see below), whose sum is σ = 194570533320. Its totient is φ = 97285266656.

The previous prime is 145927899977. The next prime is 145927900073. The reversal of 145927899987 is 789998729541.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 145927899987 - 2²⁶ = 145860791123 is a prime.

It is not an unprimeable number, because it can be changed into a prime (145927899907) 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, 24321316662 + ... + 24321316667.

It is an arithmetic number, because the mean of its divisors is an integer number (48642633330).

Almost surely, 2^145927899987 is an apocalyptic number.

145927899987 is a deficient number, since it is larger than the sum of its proper divisors (48642633333).

145927899987 is an equidigital number, since it uses as much as digits as its factorization.

145927899987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48642633332.

The product of its digits is 823011840, while the sum is 78.

The spelling of 145927899987 in words is "one hundred forty-five billion, nine hundred twenty-seven million, eight hundred ninety-nine thousand, nine hundred eighty-seven".