726961401644 has 24 divisors (see below), whose sum is σ = 1303007014848. Its totient is φ = 354689773200.

The previous prime is 726961401571. The next prime is 726961401763. The reversal of 726961401644 is 446104169627.

It is a junction number, because it is equal to n+sod(n) for n = 726961401592 and 726961401601.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1829942 + ... + 2191485.

It is an arithmetic number, because the mean of its divisors is an integer number (54291958952).

Almost surely, 2^726961401644 is an apocalyptic number.

It is an amenable number.

726961401644 is a deficient number, since it is larger than the sum of its proper divisors (576045613204).

726961401644 is a wasteful number, since it uses less digits than its factorization.

726961401644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4022525 (or 4022523 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 50.

The spelling of 726961401644 in words is "seven hundred twenty-six billion, nine hundred sixty-one million, four hundred one thousand, six hundred forty-four".