7855638854 has 8 divisors (see below), whose sum is σ = 13466809488. Its totient is φ = 3366702360.

The previous prime is 7855638823. The next prime is 7855638859. The reversal of 7855638854 is 4588365587.

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

It is a super-2 number, since 2×7855638854² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 7855638793 and 7855638802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7855638859) 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, 280558517 + ... + 280558544.

It is an arithmetic number, because the mean of its divisors is an integer number (1683351186).

Almost surely, 2^7855638854 is an apocalyptic number.

7855638854 is a deficient number, since it is larger than the sum of its proper divisors (5611170634).

7855638854 is a wasteful number, since it uses less digits than its factorization.

7855638854 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561117070.

The product of its digits is 32256000, while the sum is 59.

The square root of 7855638854 is about 88632.0419148741. The cubic root of 7855638854 is about 1987.8968086262.

The spelling of 7855638854 in words is "seven billion, eight hundred fifty-five million, six hundred thirty-eight thousand, eight hundred fifty-four".