7255620987 has 8 divisors (see below), whose sum is σ = 9674961936. Its totient is φ = 4836680352.

The previous prime is 7255620971. The next prime is 7255621001. The reversal of 7255620987 is 7890265527.

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

It is not a de Polignac number, because 7255620987 - 2⁴ = 7255620971 is a prime.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (7255620907) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 54868 + ... + 132369.

It is an arithmetic number, because the mean of its divisors is an integer number (1209370242).

Almost surely, 2^7255620987 is an apocalyptic number.

7255620987 is a deficient number, since it is larger than the sum of its proper divisors (2419340949).

7255620987 is a wasteful number, since it uses less digits than its factorization.

7255620987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 200157.

The product of its (nonzero) digits is 2116800, while the sum is 51.

The square root of 7255620987 is about 85179.9330065480. The cubic root of 7255620987 is about 1935.9383783967.

The spelling of 7255620987 in words is "seven billion, two hundred fifty-five million, six hundred twenty thousand, nine hundred eighty-seven".