7857221507146 has 16 divisors (see below), whose sum is σ = 12857335665408. Its totient is φ = 3571446513600.

The previous prime is 7857221507143. The next prime is 7857221507153. The reversal of 7857221507146 is 6417051227587.

It is not an unprimeable number, because it can be changed into a prime (7857221507143) 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, 4292551 + ... + 5842981.

It is an arithmetic number, because the mean of its divisors is an integer number (803583479088).

Almost surely, 2^{7857221507146} is an apocalyptic number.

7857221507146 is a deficient number, since it is larger than the sum of its proper divisors (5000114158262).

7857221507146 is a wasteful number, since it uses less digits than its factorization.

7857221507146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1780797.

The product of its (nonzero) digits is 6585600, while the sum is 55.

The spelling of 7857221507146 in words is "seven trillion, eight hundred fifty-seven billion, two hundred twenty-one million, five hundred seven thousand, one hundred forty-six".