1641262550420 has 24 divisors (see below), whose sum is σ = 3447528308448. Its totient is φ = 656337981600.

The previous prime is 1641262550407. The next prime is 1641262550441. The reversal of 1641262550420 is 240552621461.

It is a super-2 number, since 2×1641262550420² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10359326 + ... + 10516565.

It is an arithmetic number, because the mean of its divisors is an integer number (143647012852).

Almost surely, 2^{1641262550420} is an apocalyptic number.

1641262550420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1641262550420 is an abundant number, since it is smaller than the sum of its proper divisors (1806265758028).

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

1641262550420 is a wasteful number, since it uses less digits than its factorization.

1641262550420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20879831 (or 20879829 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 38.

The spelling of 1641262550420 in words is "one trillion, six hundred forty-one billion, two hundred sixty-two million, five hundred fifty thousand, four hundred twenty".