1961792500 has 30 divisors (see below), whose sum is σ = 4290053306. Its totient is φ = 784716000.

The previous prime is 1961792473. The next prime is 1961792501. The reversal of 1961792500 is 52971691.

It can be written as a sum of positive squares in 5 ways, for example, as 562733284 + 1399059216 = 23722^2 + 37404^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961792501) by changing a digit.

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 9 ways as a sum of consecutive naturals, for example, 389859 + ... + 394858.

Almost surely, 2^1961792500 is an apocalyptic number.

1961792500 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1961792500 is an abundant number, since it is smaller than the sum of its proper divisors (2328260806).

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

1961792500 is an equidigital number, since it uses as much as digits as its factorization.

1961792500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 784741 (or 784724 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 40.

The square root of 1961792500 is about 44292.1268398798. The cubic root of 1961792500 is about 1251.8463381523.

The spelling of 1961792500 in words is "one billion, nine hundred sixty-one million, seven hundred ninety-two thousand, five hundred".