1509261231451 has 4 divisors (see below), whose sum is σ = 1511389950400. Its totient is φ = 1507132512504.

The previous prime is 1509261231437. The next prime is 1509261231473. The reversal of 1509261231451 is 1541321629051.

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 1509261231451 - 2¹¹ = 1509261229403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1509261231551) 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, 1064358411 + ... + 1064359828.

It is an arithmetic number, because the mean of its divisors is an integer number (377847487600).

Almost surely, 2^{1509261231451} is an apocalyptic number.

1509261231451 is a deficient number, since it is larger than the sum of its proper divisors (2128718949).

1509261231451 is an equidigital number, since it uses as much as digits as its factorization.

1509261231451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2128718948.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 1509261231451 in words is "one trillion, five hundred nine billion, two hundred sixty-one million, two hundred thirty-one thousand, four hundred fifty-one".