625721216371 has 8 divisors (see below), whose sum is σ = 652950761760. Its totient is φ = 598493693952.

The previous prime is 625721216357. The next prime is 625721216383. The reversal of 625721216371 is 173612127526.

It is a happy number.

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 625721216371 - 2⁷ = 625721216243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (625721210371) 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, 144115 + ... + 1127923.

It is an arithmetic number, because the mean of its divisors is an integer number (81618845220).

Almost surely, 2^625721216371 is an apocalyptic number.

625721216371 is a deficient number, since it is larger than the sum of its proper divisors (27229545389).

625721216371 is a wasteful number, since it uses less digits than its factorization.

625721216371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1011485.

The product of its digits is 211680, while the sum is 43.

The spelling of 625721216371 in words is "six hundred twenty-five billion, seven hundred twenty-one million, two hundred sixteen thousand, three hundred seventy-one".