1345440651021 has 8 divisors (see below), whose sum is σ = 1993245408960. Its totient is φ = 896960433996.

The previous prime is 1345440651011. The next prime is 1345440651031. The reversal of 1345440651021 is 1201560445431.

1345440651021 is a `hidden beast` number, since 1 + 3 + 4 + 544 + 0 + 6 + 5 + 102 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (1345440651011) and next prime (1345440651031).

It is not a de Polignac number, because 1345440651021 - 2¹⁵ = 1345440618253 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1345440651011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24915567585 + ... + 24915567638.

It is an arithmetic number, because the mean of its divisors is an integer number (249155676120).

Almost surely, 2^{1345440651021} is an apocalyptic number.

It is an amenable number.

1345440651021 is a deficient number, since it is larger than the sum of its proper divisors (647804757939).

1345440651021 is an equidigital number, since it uses as much as digits as its factorization.

1345440651021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49831135232 (or 49831135226 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 1345440651021 in words is "one trillion, three hundred forty-five billion, four hundred forty million, six hundred fifty-one thousand, twenty-one".