2155396726 has 8 divisors (see below), whose sum is σ = 3694965840. Its totient is φ = 923741448.

The previous prime is 2155396717. The next prime is 2155396729. The reversal of 2155396726 is 6276935512.

2155396726 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2155396729) 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, 76978441 + ... + 76978468.

It is an arithmetic number, because the mean of its divisors is an integer number (461870730).

Almost surely, 2^2155396726 is an apocalyptic number.

2155396726 is a deficient number, since it is larger than the sum of its proper divisors (1539569114).

2155396726 is a wasteful number, since it uses less digits than its factorization.

2155396726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153956918.

The product of its digits is 680400, while the sum is 46.

The square root of 2155396726 is about 46426.2503978084. The cubic root of 2155396726 is about 1291.7418782113.

The spelling of 2155396726 in words is "two billion, one hundred fifty-five million, three hundred ninety-six thousand, seven hundred twenty-six".