4721915807749 has 16 divisors (see below), whose sum is σ = 5713972782336. Its totient is φ = 3809238048000.

The previous prime is 4721915807743. The next prime is 4721915807753. The reversal of 4721915807749 is 9477085191274.

It is not a de Polignac number, because 4721915807749 - 2¹⁹ = 4721915283461 is a prime.

It is a super-2 number, since 2×4721915807749² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4721915807743) 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, 20699784 + ... + 20926654.

It is an arithmetic number, because the mean of its divisors is an integer number (357123298896).

Almost surely, 2^{4721915807749} is an apocalyptic number.

It is an amenable number.

4721915807749 is a deficient number, since it is larger than the sum of its proper divisors (992056974587).

4721915807749 is a wasteful number, since it uses less digits than its factorization.

4721915807749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 401796.

The product of its (nonzero) digits is 35562240, while the sum is 64.

The spelling of 4721915807749 in words is "four trillion, seven hundred twenty-one billion, nine hundred fifteen million, eight hundred seven thousand, seven hundred forty-nine".