1641776123540 has 48 divisors (see below), whose sum is σ = 4147644950400. Its totient is φ = 533268634752.

The previous prime is 1641776123489. The next prime is 1641776123579. The reversal of 1641776123540 is 453216771461.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 308601875 + ... + 308607194.

It is an arithmetic number, because the mean of its divisors is an integer number (86409269800).

Almost surely, 2^{1641776123540} is an apocalyptic number.

1641776123540 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641776123540 is an abundant number, since it is smaller than the sum of its proper divisors (2505868826860).

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

1641776123540 is a wasteful number, since it uses less digits than its factorization.

1641776123540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617209104 (or 617209102 counting only the distinct ones).

The product of its (nonzero) digits is 846720, while the sum is 47.

The spelling of 1641776123540 in words is "one trillion, six hundred forty-one billion, seven hundred seventy-six million, one hundred twenty-three thousand, five hundred forty".