1945709057451 has 4 divisors (see below), whose sum is σ = 2594278743272. Its totient is φ = 1297139371632.

The previous prime is 1945709057423. The next prime is 1945709057477. The reversal of 1945709057451 is 1547509075491.

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

It is not a de Polignac number, because 1945709057451 - 2¹³ = 1945709049259 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1945709057391 and 1945709057400.

It is not an unprimeable number, because it can be changed into a prime (1945709057051) 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, 324284842906 + ... + 324284842911.

It is an arithmetic number, because the mean of its divisors is an integer number (648569685818).

Almost surely, 2^{1945709057451} is an apocalyptic number.

1945709057451 is a deficient number, since it is larger than the sum of its proper divisors (648569685821).

1945709057451 is an equidigital number, since it uses as much as digits as its factorization.

1945709057451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 648569685820.

The product of its (nonzero) digits is 7938000, while the sum is 57.

The spelling of 1945709057451 in words is "one trillion, nine hundred forty-five billion, seven hundred nine million, fifty-seven thousand, four hundred fifty-one".