1616537226320 has 20 divisors (see below), whose sum is σ = 3758449051380. Its totient is φ = 646614890496.

The previous prime is 1616537226319. The next prime is 1616537226349. The reversal of 1616537226320 is 236227356161.

It can be written as a sum of positive squares in 2 ways, for example, as 1192402848784 + 424134377536 = 1091972^2 + 651256^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×1616537226320² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10103357585 + ... + 10103357744.

It is an arithmetic number, because the mean of its divisors is an integer number (187922452569).

Almost surely, 2^{1616537226320} is an apocalyptic number.

1616537226320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1616537226320 is an abundant number, since it is smaller than the sum of its proper divisors (2141911825060).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1616537226320 is a wasteful number, since it uses less digits than its factorization.

1616537226320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20206715342 (or 20206715336 counting only the distinct ones).

The product of its (nonzero) digits is 544320, while the sum is 44.

The spelling of 1616537226320 in words is "one trillion, six hundred sixteen billion, five hundred thirty-seven million, two hundred twenty-six thousand, three hundred twenty".