61811950 has 12 divisors (see below), whose sum is σ = 114970320. Its totient is φ = 24724760.

The previous prime is 61811929. The next prime is 61811977. The reversal of 61811950 is 5911816.

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 5 ways as a sum of consecutive naturals, for example, 618070 + ... + 618169.

It is an arithmetic number, because the mean of its divisors is an integer number (9580860).

Almost surely, 2^61811950 is an apocalyptic number.

61811950 is a deficient number, since it is larger than the sum of its proper divisors (53158370).

61811950 is a wasteful number, since it uses less digits than its factorization.

61811950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1236251 (or 1236246 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 31.

The square root of 61811950 is about 7862.0576187153. The cubic root of 61811950 is about 395.3886043700.

The spelling of 61811950 in words is "sixty-one million, eight hundred eleven thousand, nine hundred fifty".