2601551001 has 8 divisors (see below), whose sum is σ = 3964268224. Its totient is φ = 1486600560.

The previous prime is 2601550957. The next prime is 2601551009. The reversal of 2601551001 is 1001551062.

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

It is not a de Polignac number, because 2601551001 - 2⁹ = 2601550489 is a prime.

It is a super-2 number, since 2×2601551001² = 13536135221608204002, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 123883381 = 2601551001 / (2 + 6 + 0 + 1 + 5 + 5 + 1 + 0 + 0 + 1).

It is not an unprimeable number, because it can be changed into a prime (2601551009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61941670 + ... + 61941711.

It is an arithmetic number, because the mean of its divisors is an integer number (495533528).

Almost surely, 2^2601551001 is an apocalyptic number.

2601551001 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2601551001 is a deficient number, since it is larger than the sum of its proper divisors (1362717223).

2601551001 is a wasteful number, since it uses less digits than its factorization.

2601551001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123883391.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 2601551001 is about 51005.4016845275. The cubic root of 2601551001 is about 1375.3422400539.

The spelling of 2601551001 in words is "two billion, six hundred one million, five hundred fifty-one thousand, one".