154203220210640 has 40 divisors (see below), whose sum is σ = 359307000175560. Its totient is φ = 61546318073856.

The previous prime is 154203220210583. The next prime is 154203220210661. The reversal of 154203220210640 is 46012022302451.

It can be written as a sum of positive squares in 4 ways, for example, as 60610210985536 + 93593009225104 = 7785256^2 + 9674348^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×154203220210640² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 154203220210597 and 154203220210606.

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, 2108869625 + ... + 2108942744.

It is an arithmetic number, because the mean of its divisors is an integer number (8982675004389).

Almost surely, 2^{154203220210640} is an apocalyptic number.

154203220210640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

154203220210640 is an abundant number, since it is smaller than the sum of its proper divisors (205103779964920).

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

154203220210640 is a wasteful number, since it uses less digits than its factorization.

154203220210640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4217812839 (or 4217812833 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 32.

The spelling of 154203220210640 in words is "one hundred fifty-four trillion, two hundred three billion, two hundred twenty million, two hundred ten thousand, six hundred forty".