2145597986511 has 40 divisors (see below), whose sum is σ = 3663161124480. Its totient is φ = 1226012600592.

The previous prime is 2145597986507. The next prime is 2145597986531. The reversal of 2145597986511 is 1156897955412.

It is a happy number.

2145597986511 is a `hidden beast` number, since 2 + 1 + 4 + 559 + 7 + 9 + 8 + 65 + 11 = 666.

It is not a de Polignac number, because 2145597986511 - 2² = 2145597986507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2145597986531) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 22920760 + ... + 23014178.

It is an arithmetic number, because the mean of its divisors is an integer number (91579028112).

Almost surely, 2^{2145597986511} is an apocalyptic number.

2145597986511 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

2145597986511 is a deficient number, since it is larger than the sum of its proper divisors (1517563137969).

2145597986511 is an equidigital number, since it uses as much as digits as its factorization.

2145597986511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133945 (or 133936 counting only the distinct ones).

The product of its digits is 27216000, while the sum is 63.

The spelling of 2145597986511 in words is "two trillion, one hundred forty-five billion, five hundred ninety-seven million, nine hundred eighty-six thousand, five hundred eleven".