7855017983 has 4 divisors (see below), whose sum is σ = 8196540528. Its totient is φ = 7513495440.

The previous prime is 7855017941. The next prime is 7855018001. The reversal of 7855017983 is 3897105587.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3897105587 = 971 ⋅4013497.

It is a cyclic number.

It is not a de Polignac number, because 7855017983 - 2¹⁴ = 7855001599 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 (7855017283) 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, 170761238 + ... + 170761283.

It is an arithmetic number, because the mean of its divisors is an integer number (2049135132).

Almost surely, 2^7855017983 is an apocalyptic number.

7855017983 is a deficient number, since it is larger than the sum of its proper divisors (341522545).

7855017983 is a wasteful number, since it uses less digits than its factorization.

7855017983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 341522544.

The product of its (nonzero) digits is 2116800, while the sum is 53.

The square root of 7855017983 is about 88628.5393256597. The cubic root of 7855017983 is about 1987.8444360558.

The spelling of 7855017983 in words is "seven billion, eight hundred fifty-five million, seventeen thousand, nine hundred eighty-three".