1961488550 has 48 divisors (see below), whose sum is σ = 4237963872. Its totient is φ = 661478400.

The previous prime is 1961488547. The next prime is 1961488561. The reversal of 1961488550 is 558841691.

It is a happy number.

It is a super-2 number, since 2×1961488550² = 7694874663562205000, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1961488495 and 1961488504.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24587 + ... + 67286.

It is an arithmetic number, because the mean of its divisors is an integer number (88290914).

Almost surely, 2^1961488550 is an apocalyptic number.

1961488550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1961488550 is an abundant number, since it is smaller than the sum of its proper divisors (2276475322).

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

1961488550 is a wasteful number, since it uses less digits than its factorization.

1961488550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 91953 (or 91948 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 47.

The square root of 1961488550 is about 44288.6955102541. The cubic root of 1961488550 is about 1251.7816832772.

The spelling of 1961488550 in words is "one billion, nine hundred sixty-one million, four hundred eighty-eight thousand, five hundred fifty".