1045643553251 has 8 divisors (see below), whose sum is σ = 1160035992000. Its totient is φ = 934473436840.

The previous prime is 1045643553239. The next prime is 1045643553257. The reversal of 1045643553251 is 1523553465401.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1045643553251 - 2⁶ = 1045643553187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1045643553257) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805579901 + ... + 805581198.

It is an arithmetic number, because the mean of its divisors is an integer number (145004499000).

Almost surely, 2^{1045643553251} is an apocalyptic number.

1045643553251 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1045643553251 is a deficient number, since it is larger than the sum of its proper divisors (114392438749).

1045643553251 is a wasteful number, since it uses less digits than its factorization.

1045643553251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1611161169.

The product of its (nonzero) digits is 1080000, while the sum is 44.

The spelling of 1045643553251 in words is "one trillion, forty-five billion, six hundred forty-three million, five hundred fifty-three thousand, two hundred fifty-one".