1553036751661 has 8 divisors (see below), whose sum is σ = 1623427558400. Its totient is φ = 1483914247920.

The previous prime is 1553036751653. The next prime is 1553036751677. The reversal of 1553036751661 is 1661576303551.

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 1553036751661 - 2³ = 1553036751653 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 (1553036751631) 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, 317073246 + ... + 317078143.

It is an arithmetic number, because the mean of its divisors is an integer number (202928444800).

Almost surely, 2^{1553036751661} is an apocalyptic number.

It is an amenable number.

1553036751661 is a deficient number, since it is larger than the sum of its proper divisors (70390806739).

1553036751661 is an equidigital number, since it uses as much as digits as its factorization.

1553036751661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634151499.

The product of its (nonzero) digits is 1701000, while the sum is 49.

The spelling of 1553036751661 in words is "one trillion, five hundred fifty-three billion, thirty-six million, seven hundred fifty-one thousand, six hundred sixty-one".