61961550 has 48 divisors (see below), whose sum is σ = 175619712. Its totient is φ = 14162400.

The previous prime is 61961531. The next prime is 61961561. The reversal of 61961550 is 5516916.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28456 + ... + 30555.

It is an arithmetic number, because the mean of its divisors is an integer number (3658744).

Almost surely, 2^61961550 is an apocalyptic number.

61961550 is an abundant number, since it is smaller than the sum of its proper divisors (113658162).

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

61961550 is a wasteful number, since it uses less digits than its factorization.

61961550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59033 (or 59028 counting only the distinct ones).

The product of its (nonzero) digits is 8100, while the sum is 33.

The square root of 61961550 is about 7871.5659179099. The cubic root of 61961550 is about 395.7073263432.

The spelling of 61961550 in words is "sixty-one million, nine hundred sixty-one thousand, five hundred fifty".