742464020662621 has 16 divisors (see below), whose sum is σ = 752948024156784. Its totient is φ = 731988513736704.

The previous prime is 742464020662597. The next prime is 742464020662643. The reversal of 742464020662621 is 126266020464247.

It can be written as a sum of positive squares in 8 ways, for example, as 362958166234521 + 379505854428100 = 19051461^2 + 19480910^2 .

It is a cyclic number.

It is not a de Polignac number, because 742464020662621 - 2⁷ = 742464020662493 is a prime.

It is a super-3 number, since 3×742464020662621³ (a number of 46 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (742464020668621) 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, 3996957081 + ... + 3997142833.

It is an arithmetic number, because the mean of its divisors is an integer number (47059251509799).

Almost surely, 2^{742464020662621} is an apocalyptic number.

It is an amenable number.

742464020662621 is a deficient number, since it is larger than the sum of its proper divisors (10484003494163).

742464020662621 is a wasteful number, since it uses less digits than its factorization.

742464020662621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208320.

The product of its (nonzero) digits is 9289728, while the sum is 52.

The spelling of 742464020662621 in words is "seven hundred forty-two trillion, four hundred sixty-four billion, twenty million, six hundred sixty-two thousand, six hundred twenty-one".