2645138192508 has 432 divisors, whose sum is σ = 8359024128000. Its totient is φ = 731297458080.

The previous prime is 2645138192447. The next prime is 2645138192513. The reversal of 2645138192508 is 8052918315462.

2645138192508 is a `hidden beast` number, since 2 + 6 + 4 + 5 + 1 + 381 + 9 + 250 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 279047713 + ... + 279057191.

Almost surely, 2^{2645138192508} is an apocalyptic number.

2645138192508 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2645138192508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4179512064000).

2645138192508 is an abundant number, since it is smaller than the sum of its proper divisors (5713885935492).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2645138192508 is an frugal number, since it uses more digits than its factorization.

2645138192508 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9559 (or 9522 counting only the distinct ones).

The product of its (nonzero) digits is 4147200, while the sum is 54.

The spelling of 2645138192508 in words is "two trillion, six hundred forty-five billion, one hundred thirty-eight million, one hundred ninety-two thousand, five hundred eight".