6172878901 has 4 divisors (see below), whose sum is σ = 7054718752. Its totient is φ = 5291039052.

The previous prime is 6172878869. The next prime is 6172878923. The reversal of 6172878901 is 1098782716.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6172878901 - 2⁵ = 6172878869 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6172878931) 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, 440919915 + ... + 440919928.

It is an arithmetic number, because the mean of its divisors is an integer number (1763679688).

Almost surely, 2^6172878901 is an apocalyptic number.

It is an amenable number.

6172878901 is a deficient number, since it is larger than the sum of its proper divisors (881839851).

6172878901 is an equidigital number, since it uses as much as digits as its factorization.

6172878901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 881839850.

The product of its (nonzero) digits is 338688, while the sum is 49.

The square root of 6172878901 is about 78567.6708385835. The cubic root of 6172878901 is about 1834.4079295210.

The spelling of 6172878901 in words is "six billion, one hundred seventy-two million, eight hundred seventy-eight thousand, nine hundred one".