7893557961 has 8 divisors (see below), whose sum is σ = 11078677920. Its totient is φ = 4985404992.

The previous prime is 7893557957. The next prime is 7893557977. The reversal of 7893557961 is 1697553987.

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

It is not a de Polignac number, because 7893557961 - 2² = 7893557957 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7893557895 and 7893557904.

It is not an unprimeable number, because it can be changed into a prime (7893557981) 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, 69241680 + ... + 69241793.

It is an arithmetic number, because the mean of its divisors is an integer number (1384834740).

Almost surely, 2^7893557961 is an apocalyptic number.

It is an amenable number.

7893557961 is a deficient number, since it is larger than the sum of its proper divisors (3185119959).

7893557961 is a wasteful number, since it uses less digits than its factorization.

7893557961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138483495.

The product of its digits is 14288400, while the sum is 60.

The square root of 7893557961 is about 88845.6974816451. The cubic root of 7893557961 is about 1991.0901967279.

The spelling of 7893557961 in words is "seven billion, eight hundred ninety-three million, five hundred fifty-seven thousand, nine hundred sixty-one".