61387616 has 12 divisors (see below), whose sum is σ = 120856932. Its totient is φ = 30693792.

The previous prime is 61387603. The next prime is 61387631. The reversal of 61387616 is 61678316.

It is a self number, because there is not a number n which added to its sum of digits gives 61387616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 959150 + ... + 959213.

It is an arithmetic number, because the mean of its divisors is an integer number (10071411).

Almost surely, 2^61387616 is an apocalyptic number.

It is an amenable number.

61387616 is a deficient number, since it is larger than the sum of its proper divisors (59469316).

61387616 is a wasteful number, since it uses less digits than its factorization.

61387616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1918373 (or 1918365 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 61387616 is about 7835.0249520981. The cubic root of 61387616 is about 394.4817558628.

The spelling of 61387616 in words is "sixty-one million, three hundred eighty-seven thousand, six hundred sixteen".