61955616 has 48 divisors (see below), whose sum is σ = 172204704. Its totient is φ = 19436544.

The previous prime is 61955603. The next prime is 61955651. The reversal of 61955616 is 61655916.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17350 + ... + 20613.

It is an arithmetic number, because the mean of its divisors is an integer number (3587598).

Almost surely, 2^61955616 is an apocalyptic number.

It is an amenable number.

61955616 is an abundant number, since it is smaller than the sum of its proper divisors (110249088).

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

61955616 is a wasteful number, since it uses less digits than its factorization.

61955616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37993 (or 37985 counting only the distinct ones).

The product of its digits is 48600, while the sum is 39.

The square root of 61955616 is about 7871.1889826125. The cubic root of 61955616 is about 395.6946937658.

It can be divided in two parts, 6195 and 5616, that added together give a palindrome (11811).

The spelling of 61955616 in words is "sixty-one million, nine hundred fifty-five thousand, six hundred sixteen".