725047427101661 has 8 divisors (see below), whose sum is σ = 760486778054400. Its totient is φ = 690441943230288.

The previous prime is 725047427101643. The next prime is 725047427101681. The reversal of 725047427101661 is 166101724740527.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 725047427101661 - 2¹⁸ = 725047426839517 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 (725047427101601) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 208466768561 + ... + 208466772038.

It is an arithmetic number, because the mean of its divisors is an integer number (95060847256800).

Almost surely, 2^{725047427101661} is an apocalyptic number.

It is an amenable number.

725047427101661 is a deficient number, since it is larger than the sum of its proper divisors (35439350952739).

725047427101661 is a wasteful number, since it uses less digits than its factorization.

725047427101661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 416933540683.

The product of its (nonzero) digits is 3951360, while the sum is 53.

The spelling of 725047427101661 in words is "seven hundred twenty-five trillion, forty-seven billion, four hundred twenty-seven million, one hundred one thousand, six hundred sixty-one".