1545140040251 has 4 divisors (see below), whose sum is σ = 1636030630872. Its totient is φ = 1454249449632.

The previous prime is 1545140040221. The next prime is 1545140040281. The reversal of 1545140040251 is 1520400415451.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (1545140040221) and next prime (1545140040281).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1545140040251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1545140040221) 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, 45445295285 + ... + 45445295318.

It is an arithmetic number, because the mean of its divisors is an integer number (409007657718).

Almost surely, 2^{1545140040251} is an apocalyptic number.

1545140040251 is a deficient number, since it is larger than the sum of its proper divisors (90890590621).

1545140040251 is an equidigital number, since it uses as much as digits as its factorization.

1545140040251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90890590620.

The product of its (nonzero) digits is 16000, while the sum is 32.

The spelling of 1545140040251 in words is "one trillion, five hundred forty-five billion, one hundred forty million, forty thousand, two hundred fifty-one".