100400055661 has 8 divisors (see below), whose sum is σ = 102121760448. Its totient is φ = 98686896000.

The previous prime is 100400055583. The next prime is 100400055667. The reversal of 100400055661 is 166550004001.

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 100400055661 - 2³¹ = 98252572013 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 (100400055667) 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, 2112580 + ... + 2159581.

It is an arithmetic number, because the mean of its divisors is an integer number (12765220056).

Almost surely, 2^100400055661 is an apocalyptic number.

It is an amenable number.

100400055661 is a deficient number, since it is larger than the sum of its proper divisors (1721704787).

100400055661 is an equidigital number, since it uses as much as digits as its factorization.

100400055661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4272563.

The product of its (nonzero) digits is 3600, while the sum is 28.

Adding to 100400055661 its reverse (166550004001), we get a palindrome (266950059662).

The spelling of 100400055661 in words is "one hundred billion, four hundred million, fifty-five thousand, six hundred sixty-one".