2151209840607 has 8 divisors (see below), whose sum is σ = 3186977541680. Its totient is φ = 1434139893720.

The previous prime is 2151209840581. The next prime is 2151209840609. The reversal of 2151209840607 is 7060489021512.

2151209840607 is a `hidden beast` number, since 2 + 1 + 512 + 0 + 98 + 40 + 6 + 0 + 7 = 666.

It is not a de Polignac number, because 2151209840607 - 2⁶ = 2151209840543 is a prime.

It is a super-2 number, since 2×2151209840607² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2151209840609) 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, 39837219244 + ... + 39837219297.

It is an arithmetic number, because the mean of its divisors is an integer number (398372192710).

Almost surely, 2^{2151209840607} is an apocalyptic number.

2151209840607 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

2151209840607 is a deficient number, since it is larger than the sum of its proper divisors (1035767701073).

2151209840607 is an equidigital number, since it uses as much as digits as its factorization.

2151209840607 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79674438550 (or 79674438544 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The spelling of 2151209840607 in words is "two trillion, one hundred fifty-one billion, two hundred nine million, eight hundred forty thousand, six hundred seven".