1395139726764 has 216 divisors, whose sum is σ = 4210973032448. Its totient is φ = 396157379040.

The previous prime is 1395139726753. The next prime is 1395139726829. The reversal of 1395139726764 is 4676279315931.

It is a happy number.

1395139726764 is a `hidden beast` number, since 1 + 3 + 9 + 513 + 97 + 26 + 7 + 6 + 4 = 666.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 29921109 + ... + 29967699.

Almost surely, 2^{1395139726764} is an apocalyptic number.

1395139726764 is a gapful number since it is divisible by the number (14) 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 1395139726764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2105486516224).

1395139726764 is an abundant number, since it is smaller than the sum of its proper divisors (2815833305684).

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

1395139726764 is an equidigital number, since it uses as much as digits as its factorization.

1395139726764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46789 (or 46766 counting only the distinct ones).

The product of its digits is 51438240, while the sum is 63.

The spelling of 1395139726764 in words is "one trillion, three hundred ninety-five billion, one hundred thirty-nine million, seven hundred twenty-six thousand, seven hundred sixty-four".