2151669726 has 24 divisors (see below), whose sum is σ = 4749914520. Its totient is φ = 703690416.

The previous prime is 2151669721. The next prime is 2151669739. The reversal of 2151669726 is 6279661512.

2151669726 is a `hidden beast` number, since 2 + 1 + 516 + 69 + 72 + 6 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151669721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1126756 + ... + 1128663.

It is an arithmetic number, because the mean of its divisors is an integer number (197913105).

Almost surely, 2^2151669726 is an apocalyptic number.

2151669726 is an abundant number, since it is smaller than the sum of its proper divisors (2598244794).

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

2151669726 is a wasteful number, since it uses less digits than its factorization.

2151669726 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2255480 (or 2255477 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 2151669726 is about 46386.0941015732. The cubic root of 2151669726 is about 1290.9969110192.

The spelling of 2151669726 in words is "two billion, one hundred fifty-one million, six hundred sixty-nine thousand, seven hundred twenty-six".