1101161561551 has 8 divisors (see below), whose sum is σ = 1168165103184. Its totient is φ = 1034405723520.

The previous prime is 1101161561543. The next prime is 1101161561611. The reversal of 1101161561551 is 1551651611011.

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 1101161561551 - 2³ = 1101161561543 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 (1101161561531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61916740 + ... + 61934521.

It is an arithmetic number, because the mean of its divisors is an integer number (146020637898).

Almost surely, 2^{1101161561551} is an apocalyptic number.

1101161561551 is a deficient number, since it is larger than the sum of its proper divisors (67003541633).

1101161561551 is a wasteful number, since it uses less digits than its factorization.

1101161561551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123851801.

The product of its (nonzero) digits is 4500, while the sum is 34.

The spelling of 1101161561551 in words is "one trillion, one hundred one billion, one hundred sixty-one million, five hundred sixty-one thousand, five hundred fifty-one".