1016721056546 has 32 divisors (see below), whose sum is σ = 1647754759728. Its totient is φ = 467726434560.

The previous prime is 1016721056539. The next prime is 1016721056599. The reversal of 1016721056546 is 6456501276101.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 795387504025 + 221333552521 = 891845^2 + 470461^2 .

It is a super-3 number, since 3×1016721056546³ (a number of 37 digits) contains 333 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1016721056497 and 1016721056506.

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, 14136236 + ... + 14207976.

Almost surely, 2^{1016721056546} is an apocalyptic number.

1016721056546 is a deficient number, since it is larger than the sum of its proper divisors (631033703182).

1016721056546 is a wasteful number, since it uses less digits than its factorization.

1016721056546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73526.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 1016721056546 in words is "one trillion, sixteen billion, seven hundred twenty-one million, fifty-six thousand, five hundred forty-six".