721552672725 has 12 divisors (see below), whose sum is σ = 1192967085696. Its totient is φ = 384828092080.

The previous prime is 721552672717. The next prime is 721552672733. The reversal of 721552672725 is 527276255127.

It is an interprime number because it is at equal distance from previous prime (721552672717) and next prime (721552672733).

It is not a de Polignac number, because 721552672725 - 2³ = 721552672717 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4810351077 + ... + 4810351226.

It is an arithmetic number, because the mean of its divisors is an integer number (99413923808).

Almost surely, 2^721552672725 is an apocalyptic number.

721552672725 is a gapful number since it is divisible by the number (75) formed by its first and last digit.

It is an amenable number.

721552672725 is a deficient number, since it is larger than the sum of its proper divisors (471414412971).

721552672725 is a wasteful number, since it uses less digits than its factorization.

721552672725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9620702316 (or 9620702311 counting only the distinct ones).

The product of its digits is 4116000, while the sum is 51.

The spelling of 721552672725 in words is "seven hundred twenty-one billion, five hundred fifty-two million, six hundred seventy-two thousand, seven hundred twenty-five".