7642172761 has 8 divisors (see below), whose sum is σ = 8045229920. Its totient is φ = 7239199392.

The previous prime is 7642172743. The next prime is 7642172801. The reversal of 7642172761 is 1672712467.

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

It is a cyclic number.

It is not a de Polignac number, because 7642172761 - 2⁵ = 7642172729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7642172261) 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, 270061 + ... + 297013.

It is an arithmetic number, because the mean of its divisors is an integer number (1005653740).

Almost surely, 2^7642172761 is an apocalyptic number.

It is an amenable number.

7642172761 is a deficient number, since it is larger than the sum of its proper divisors (403057159).

7642172761 is a wasteful number, since it uses less digits than its factorization.

7642172761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41895.

The product of its digits is 197568, while the sum is 43.

The square root of 7642172761 is about 87419.5216241773. The cubic root of 7642172761 is about 1969.7250907755.

The spelling of 7642172761 in words is "seven billion, six hundred forty-two million, one hundred seventy-two thousand, seven hundred sixty-one".