721061454372 has 48 divisors (see below), whose sum is σ = 1949912681472. Its totient is φ = 203115900960.

The previous prime is 721061454371. The next prime is 721061454403. The reversal of 721061454372 is 273454160127.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (721061454371) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60445198 + ... + 60457125.

It is an arithmetic number, because the mean of its divisors is an integer number (40623180864).

Almost surely, 2^721061454372 is an apocalyptic number.

It is an amenable number.

721061454372 is an abundant number, since it is smaller than the sum of its proper divisors (1228851227100).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

721061454372 is a wasteful number, since it uses less digits than its factorization.

721061454372 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120902408 (or 120902406 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 721061454372 in words is "seven hundred twenty-one billion, sixty-one million, four hundred fifty-four thousand, three hundred seventy-two".