2158939601 has 16 divisors (see below), whose sum is σ = 2658251904. Its totient is φ = 1707467904.

The previous prime is 2158939591. The next prime is 2158939609. The reversal of 2158939601 is 1069398512.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2158939601 is a prime.

It is a super-2 number, since 2×2158939601² = 9322040401532078402, which contains 22 as substring.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (2158939609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402926 + ... + 408248.

It is an arithmetic number, because the mean of its divisors is an integer number (166140744).

Almost surely, 2^2158939601 is an apocalyptic number.

It is an amenable number.

2158939601 is a deficient number, since it is larger than the sum of its proper divisors (499312303).

2158939601 is a wasteful number, since it uses less digits than its factorization.

2158939601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9800.

The product of its (nonzero) digits is 116640, while the sum is 44.

The square root of 2158939601 is about 46464.3906771627. The cubic root of 2158939601 is about 1292.4492460245.

The spelling of 2158939601 in words is "two billion, one hundred fifty-eight million, nine hundred thirty-nine thousand, six hundred one".