1961352900 has 576 divisors, whose sum is σ = 7612012800. Its totient is φ = 427991040.

The previous prime is 1961352889. The next prime is 1961352959. The reversal of 1961352900 is 92531691.

1961352900 is a `hidden beast` number, since 19 + 613 + 5 + 29 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 11337214 + ... + 11337386.

It is an arithmetic number, because the mean of its divisors is an integer number (13215300).

Almost surely, 2^1961352900 is an apocalyptic number.

1961352900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1961352900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3806006400).

1961352900 is an abundant number, since it is smaller than the sum of its proper divisors (5650659900).

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

1961352900 is a wasteful number, since it uses less digits than its factorization.

1961352900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245 (or 232 counting only the distinct ones).

The product of its (nonzero) digits is 14580, while the sum is 36.

The square root of 1961352900 is about 44287.1640546107. The cubic root of 1961352900 is about 1251.7528262645.

The spelling of 1961352900 in words is "one billion, nine hundred sixty-one million, three hundred fifty-two thousand, nine hundred".