1613365555901 has 32 divisors (see below), whose sum is σ = 1807384461696. Its totient is φ = 1427489280000.

The previous prime is 1613365555897. The next prime is 1613365555973. The reversal of 1613365555901 is 1095555633161.

It is a cyclic number.

It is not a de Polignac number, because 1613365555901 - 2² = 1613365555897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1613365555901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1613365554901) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 201239045 + ... + 201247061.

It is an arithmetic number, because the mean of its divisors is an integer number (56480764428).

Almost surely, 2^{1613365555901} is an apocalyptic number.

1613365555901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1613365555901 is a deficient number, since it is larger than the sum of its proper divisors (194018905795).

1613365555901 is a wasteful number, since it uses less digits than its factorization.

1613365555901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9533.

The product of its (nonzero) digits is 1822500, while the sum is 50.

The spelling of 1613365555901 in words is "one trillion, six hundred thirteen billion, three hundred sixty-five million, five hundred fifty-five thousand, nine hundred one".