55659970434721 has 9 divisors (see below), whose sum is σ = 56240431393881. Its totient is φ = 55085440092672.

The previous prime is 55659970434709. The next prime is 55659970434743. The reversal of 55659970434721 is 12743407995655.

The square root of 55659970434721 is 7460561.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 435453492321 + 55224516942400 = 659889^2 + 7431320^2 .

It is not a de Polignac number, because 55659970434721 - 2²⁹ = 55659433563809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55659970434221) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 723635961 + ... + 723712873.

Almost surely, 2^{55659970434721} is an apocalyptic number.

55659970434721 is the 7460561-st square number.

55659970434721 is the 3730281-st centered octagonal number.

It is an amenable number.

55659970434721 is a deficient number, since it is larger than the sum of its proper divisors (580460959160).

55659970434721 is an frugal number, since it uses more digits than its factorization.

55659970434721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154020 (or 77010 counting only the distinct ones).

The product of its (nonzero) digits is 285768000, while the sum is 67.

The spelling of 55659970434721 in words is "fifty-five trillion, six hundred fifty-nine billion, nine hundred seventy million, four hundred thirty-four thousand, seven hundred twenty-one".