10721731546 has 4 divisors (see below), whose sum is σ = 16082597322. Its totient is φ = 5360865772.

The previous prime is 10721731519. The next prime is 10721731561. The reversal of 10721731546 is 64513712701.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64513712701 = 83 ⋅777273647.

It can be written as a sum of positive squares in only one way, i.e., 8365114521 + 2356617025 = 91461^2 + 48545^2 .

It is a super-2 number, since 2×10721731546² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2680432885 + ... + 2680432888.

Almost surely, 2^10721731546 is an apocalyptic number.

10721731546 is a deficient number, since it is larger than the sum of its proper divisors (5360865776).

10721731546 is an equidigital number, since it uses as much as digits as its factorization.

10721731546 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5360865775.

The product of its (nonzero) digits is 35280, while the sum is 37.

The spelling of 10721731546 in words is "ten billion, seven hundred twenty-one million, seven hundred thirty-one thousand, five hundred forty-six".