1156505653421 has 8 divisors (see below), whose sum is σ = 1165069909920. Its totient is φ = 1147962997872.

The previous prime is 1156505653417. The next prime is 1156505653447. The reversal of 1156505653421 is 1243565056511.

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 1156505653421 - 2² = 1156505653417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1156505653481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5292755 + ... + 5506928.

It is an arithmetic number, because the mean of its divisors is an integer number (145633738740).

Almost surely, 2^{1156505653421} is an apocalyptic number.

It is an amenable number.

1156505653421 is a deficient number, since it is larger than the sum of its proper divisors (8564256499).

1156505653421 is a wasteful number, since it uses less digits than its factorization.

1156505653421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10800475.

The product of its (nonzero) digits is 540000, while the sum is 44.

The spelling of 1156505653421 in words is "one trillion, one hundred fifty-six billion, five hundred five million, six hundred fifty-three thousand, four hundred twenty-one".