720020621615 has 16 divisors (see below), whose sum is σ = 892588688640. Its totient is φ = 557002709760.

The previous prime is 720020621599. The next prime is 720020621633. The reversal of 720020621615 is 516126020027.

720020621615 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 720020621615 - 2⁴ = 720020621599 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1602104 + ... + 2001693.

It is an arithmetic number, because the mean of its divisors is an integer number (55786793040).

Almost surely, 2^720020621615 is an apocalyptic number.

720020621615 is a deficient number, since it is larger than the sum of its proper divisors (172568067025).

720020621615 is a wasteful number, since it uses less digits than its factorization.

720020621615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605122.

The product of its (nonzero) digits is 10080, while the sum is 32.

The spelling of 720020621615 in words is "seven hundred twenty billion, twenty million, six hundred twenty-one thousand, six hundred fifteen".