3861844256402 has 16 divisors (see below), whose sum is σ = 6319443312000. Its totient is φ = 1755366585840.

The previous prime is 3861844256393. The next prime is 3861844256471. The reversal of 3861844256402 is 2046524481683.

It is a happy number.

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, 1598624 + ... + 3206132.

It is an arithmetic number, because the mean of its divisors is an integer number (394965207000).

Almost surely, 2^{3861844256402} is an apocalyptic number.

3861844256402 is a deficient number, since it is larger than the sum of its proper divisors (2457599055598).

3861844256402 is a wasteful number, since it uses less digits than its factorization.

3861844256402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716721.

The product of its (nonzero) digits is 8847360, while the sum is 53.

The spelling of 3861844256402 in words is "three trillion, eight hundred sixty-one billion, eight hundred forty-four million, two hundred fifty-six thousand, four hundred two".