921739130444 has 72 divisors (see below), whose sum is σ = 1807115017680. Its totient is φ = 410919949440.

The previous prime is 921739130423. The next prime is 921739130461. The reversal of 921739130444 is 444031937129.

It is a super-2 number, since 2×921739130444² (a number of 25 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 104989247 + ... + 104998025.

It is an arithmetic number, because the mean of its divisors is an integer number (25098819690).

Almost surely, 2^921739130444 is an apocalyptic number.

It is an amenable number.

921739130444 is a deficient number, since it is larger than the sum of its proper divisors (885375887236).

921739130444 is a wasteful number, since it uses less digits than its factorization.

921739130444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12951 (or 12938 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 921739130444 in words is "nine hundred twenty-one billion, seven hundred thirty-nine million, one hundred thirty thousand, four hundred forty-four".