1672221404736 has 63 divisors (see below), whose sum is σ = 4793209686993. Its totient is φ = 557396789760.

The previous prime is 1672221404723. The next prime is 1672221404747. The reversal of 1672221404736 is 6374041222761.

The square root of 1672221404736 is 1293144.

It is a perfect power (a square), and thus also a powerful number.

1672221404736 is a `hidden beast` number, since 16 + 7 + 2 + 22 + 140 + 473 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 895566966336 + 776654438400 = 946344^2 + 881280^2 .

It is a super-2 number, since 2×1672221404736² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1672221404691 and 1672221404700.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 31008516 + ... + 31062396.

Almost surely, 2^{1672221404736} is an apocalyptic number.

1672221404736 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

1672221404736 is the 1293144-th square number.

It is an amenable number.

1672221404736 is an abundant number, since it is smaller than the sum of its proper divisors (3120988282257).

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

1672221404736 is an frugal number, since it uses more digits than its factorization.

1672221404736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 107780 (or 53886 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The spelling of 1672221404736 in words is "one trillion, six hundred seventy-two billion, two hundred twenty-one million, four hundred four thousand, seven hundred thirty-six".