61801002 has 32 divisors (see below), whose sum is σ = 138116160. Its totient is φ = 20483280.

The previous prime is 61800983. The next prime is 61801031. The reversal of 61801002 is 20010816.

It is a Harshad number since it is a multiple of its sum of digits (18).

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, 6613 + ... + 12935.

It is an arithmetic number, because the mean of its divisors is an integer number (4316130).

Almost surely, 2^61801002 is an apocalyptic number.

61801002 is an abundant number, since it is smaller than the sum of its proper divisors (76315158).

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

61801002 is a wasteful number, since it uses less digits than its factorization.

61801002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6515 (or 6509 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

The square root of 61801002 is about 7861.3613324920. The cubic root of 61801002 is about 395.3652595312.

Adding to 61801002 its reverse (20010816), we get a palindrome (81811818).

The spelling of 61801002 in words is "sixty-one million, eight hundred one thousand, two".