1616354357261 has 4 divisors (see below), whose sum is σ = 1847262122592. Its totient is φ = 1385446591932.

The previous prime is 1616354357251. The next prime is 1616354357291. The reversal of 1616354357261 is 1627534536161.

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 1616354357261 - 2⁶ = 1616354357197 is a prime.

It is a super-2 number, since 2×1616354357261² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616354357251) 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, 115453882655 + ... + 115453882668.

It is an arithmetic number, because the mean of its divisors is an integer number (461815530648).

Almost surely, 2^{1616354357261} is an apocalyptic number.

It is an amenable number.

1616354357261 is a deficient number, since it is larger than the sum of its proper divisors (230907765331).

1616354357261 is an equidigital number, since it uses as much as digits as its factorization.

1616354357261 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 230907765330.

The product of its digits is 2721600, while the sum is 50.

The spelling of 1616354357261 in words is "one trillion, six hundred sixteen billion, three hundred fifty-four million, three hundred fifty-seven thousand, two hundred sixty-one".