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13061610661 = 111187419151
BaseRepresentation
bin11000010101000100…
…00101110010100101
31020201021201120101211
430022202011302211
5203222233020121
610000031351421
7641451600361
oct141242056245
936637646354
1013061610661
1155a2a36460
122646382571
131302093b08
148bca062a1
15516a71ce1
hex30a885ca5

13061610661 has 4 divisors (see below), whose sum is σ = 14249029824. Its totient is φ = 11874191500.

The previous prime is 13061610659. The next prime is 13061610689. The reversal of 13061610661 is 16601616031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 13061610661 - 21 = 13061610659 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 (13061640661) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 593709565 + ... + 593709586.

It is an arithmetic number, because the mean of its divisors is an integer number (3562257456).

Almost surely, 213061610661 is an apocalyptic number.

13061610661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

13061610661 is a deficient number, since it is larger than the sum of its proper divisors (1187419163).

13061610661 is a wasteful number, since it uses less digits than its factorization.

13061610661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187419162.

The product of its (nonzero) digits is 3888, while the sum is 31.

The spelling of 13061610661 in words is "thirteen billion, sixty-one million, six hundred ten thousand, six hundred sixty-one".

Divisors: 1 11 1187419151 13061610661