4861367021621 has 16 divisors (see below), whose sum is σ = 5378384147328. Its totient is φ = 4356871142400.

The previous prime is 4861367021603. The next prime is 4861367021633. The reversal of 4861367021621 is 1261207631684.

It is a cyclic number.

It is not a de Polignac number, because 4861367021621 - 2²² = 4861362827317 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 (4861367021681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11215685 + ... + 11641061.

It is an arithmetic number, because the mean of its divisors is an integer number (336149009208).

Almost surely, 2^{4861367021621} is an apocalyptic number.

It is an amenable number.

4861367021621 is a deficient number, since it is larger than the sum of its proper divisors (517017125707).

4861367021621 is a wasteful number, since it uses less digits than its factorization.

4861367021621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 440092.

The product of its (nonzero) digits is 580608, while the sum is 47.

The spelling of 4861367021621 in words is "four trillion, eight hundred sixty-one billion, three hundred sixty-seven million, twenty-one thousand, six hundred twenty-one".