1103651612661 has 16 divisors (see below), whose sum is σ = 1584869074880. Its totient is φ = 679110842880.

The previous prime is 1103651612659. The next prime is 1103651612663. The reversal of 1103651612661 is 1662161563011.

It is an interprime number because it is at equal distance from previous prime (1103651612659) and next prime (1103651612663).

It is not a de Polignac number, because 1103651612661 - 2¹ = 1103651612659 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1103651612663) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 783196 + ... + 1679493.

It is an arithmetic number, because the mean of its divisors is an integer number (99054317180).

Almost surely, 2^{1103651612661} is an apocalyptic number.

It is an amenable number.

1103651612661 is a deficient number, since it is larger than the sum of its proper divisors (481217462219).

1103651612661 is a wasteful number, since it uses less digits than its factorization.

1103651612661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2474196.

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 1103651612661 in words is "one trillion, one hundred three billion, six hundred fifty-one million, six hundred twelve thousand, six hundred sixty-one".