1001001078551 has 8 divisors (see below), whose sum is σ = 1008643634304. Its totient is φ = 993385867320.

The previous prime is 1001001078527. The next prime is 1001001078589. The reversal of 1001001078551 is 1558701001001.

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 1001001078551 - 2²² = 1000996884247 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 (1001001078151) 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, 6762635 + ... + 6909068.

It is an arithmetic number, because the mean of its divisors is an integer number (126080454288).

Almost surely, 2^{1001001078551} is an apocalyptic number.

1001001078551 is a deficient number, since it is larger than the sum of its proper divisors (7642555753).

1001001078551 is a wasteful number, since it uses less digits than its factorization.

1001001078551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13672261.

The product of its (nonzero) digits is 1400, while the sum is 29.

Adding to 1001001078551 its reverse (1558701001001), we get a palindrome (2559702079552).

The spelling of 1001001078551 in words is "one trillion, one billion, one million, seventy-eight thousand, five hundred fifty-one".