72031646325421 has 8 divisors (see below), whose sum is σ = 72599097867264. Its totient is φ = 71464199052960.

The previous prime is 72031646325371. The next prime is 72031646325433. The reversal of 72031646325421 is 12452364613027.

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 72031646325421 - 2¹⁹ = 72031645801133 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 (72031646326421) 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, 38589426 + ... + 40412956.

It is an arithmetic number, because the mean of its divisors is an integer number (9074887233408).

Almost surely, 2^{72031646325421} is an apocalyptic number.

It is an amenable number.

72031646325421 is a deficient number, since it is larger than the sum of its proper divisors (567451541843).

72031646325421 is a wasteful number, since it uses less digits than its factorization.

72031646325421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134691.

The product of its (nonzero) digits is 1451520, while the sum is 46.

The spelling of 72031646325421 in words is "seventy-two trillion, thirty-one billion, six hundred forty-six million, three hundred twenty-five thousand, four hundred twenty-one".