721796054402 has 4 divisors (see below), whose sum is σ = 1082694081606. Its totient is φ = 360898027200.

The previous prime is 721796054401. The next prime is 721796054407. The reversal of 721796054402 is 204450697127.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 669501969361 + 52294085041 = 818231^2 + 228679^2 .

It is not an unprimeable number, because it can be changed into a prime (721796054401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 180449013599 + ... + 180449013602.

Almost surely, 2^721796054402 is an apocalyptic number.

721796054402 is a deficient number, since it is larger than the sum of its proper divisors (360898027204).

721796054402 is a wasteful number, since it uses less digits than its factorization.

721796054402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360898027203.

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 721796054402 in words is "seven hundred twenty-one billion, seven hundred ninety-six million, fifty-four thousand, four hundred two".