61800516 has 48 divisors (see below), whose sum is σ = 160735680. Its totient is φ = 20534400.

The previous prime is 61800509. The next prime is 61800539. The reversal of 61800516 is 61500816.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 61800516.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 42595 + ... + 44021.

It is an arithmetic number, because the mean of its divisors is an integer number (3348660).

Almost surely, 2^61800516 is an apocalyptic number.

It is an amenable number.

61800516 is an abundant number, since it is smaller than the sum of its proper divisors (98935164).

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

61800516 is a wasteful number, since it uses less digits than its factorization.

61800516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841 (or 1833 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 61800516 is about 7861.3304217543. The cubic root of 61800516 is about 395.3642231509.

The spelling of 61800516 in words is "sixty-one million, eight hundred thousand, five hundred sixteen".