1961235550 has 12 divisors (see below), whose sum is σ = 3647898216. Its totient is φ = 784494200.

The previous prime is 1961235539. The next prime is 1961235607. The reversal of 1961235550 is 555321691.

It is a super-3 number, since 3×1961235550³ (a number of 29 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19612306 + ... + 19612405.

It is an arithmetic number, because the mean of its divisors is an integer number (303991518).

Almost surely, 2^1961235550 is an apocalyptic number.

1961235550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1961235550 is a deficient number, since it is larger than the sum of its proper divisors (1686662666).

1961235550 is a wasteful number, since it uses less digits than its factorization.

1961235550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39224723 (or 39224718 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 37.

The square root of 1961235550 is about 44285.8391588101. The cubic root of 1961235550 is about 1251.7278611628.

The spelling of 1961235550 in words is "one billion, nine hundred sixty-one million, two hundred thirty-five thousand, five hundred fifty".