1616537226251 has 4 divisors (see below), whose sum is σ = 1622373100992. Its totient is φ = 1610701351512.

The previous prime is 1616537226233. The next prime is 1616537226253. The reversal of 1616537226251 is 1526227356161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1616537226251 is a prime.

It is a super-2 number, since 2×1616537226251² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1616537226196 and 1616537226205.

It is not an unprimeable number, because it can be changed into a prime (1616537226253) 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, 2917936955 + ... + 2917937508.

It is an arithmetic number, because the mean of its divisors is an integer number (405593275248).

Almost surely, 2^{1616537226251} is an apocalyptic number.

1616537226251 is a deficient number, since it is larger than the sum of its proper divisors (5835874741).

1616537226251 is an equidigital number, since it uses as much as digits as its factorization.

1616537226251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5835874740.

The product of its digits is 907200, while the sum is 47.

The spelling of 1616537226251 in words is "one trillion, six hundred sixteen billion, five hundred thirty-seven million, two hundred twenty-six thousand, two hundred fifty-one".