7857146865090 has 16 divisors (see below), whose sum is σ = 18857152476288. Its totient is φ = 2095239164016.

The previous prime is 7857146865079. The next prime is 7857146865107. The reversal of 7857146865090 is 905686417587.

It is a happy number.

It is a super-2 number, since 2×7857146865090² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130952447722 + ... + 130952447781.

It is an arithmetic number, because the mean of its divisors is an integer number (1178572029768).

Almost surely, 2^{7857146865090} is an apocalyptic number.

7857146865090 is an abundant number, since it is smaller than the sum of its proper divisors (11000005611198).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7857146865090 is a wasteful number, since it uses less digits than its factorization.

7857146865090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261904895513.

The product of its (nonzero) digits is 101606400, while the sum is 66.

The spelling of 7857146865090 in words is "seven trillion, eight hundred fifty-seven billion, one hundred forty-six million, eight hundred sixty-five thousand, ninety".