1075720398451 has 4 divisors (see below), whose sum is σ = 1075722543952. Its totient is φ = 1075718252952.

The previous prime is 1075720398377. The next prime is 1075720398503. The reversal of 1075720398451 is 1548930275701.

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

It is a cyclic number.

It is not a de Polignac number, because 1075720398451 - 2¹³ = 1075720390259 is a prime.

It is a super-3 number, since 3×1075720398451³ (a number of 37 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1075720396451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 125386 + ... + 1472128.

It is an arithmetic number, because the mean of its divisors is an integer number (268930635988).

Almost surely, 2^{1075720398451} is an apocalyptic number.

1075720398451 is a deficient number, since it is larger than the sum of its proper divisors (2145501).

1075720398451 is an equidigital number, since it uses as much as digits as its factorization.

1075720398451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2145500.

The product of its (nonzero) digits is 2116800, while the sum is 52.

The spelling of 1075720398451 in words is "one trillion, seventy-five billion, seven hundred twenty million, three hundred ninety-eight thousand, four hundred fifty-one".