61218629802 has 96 divisors (see below), whose sum is σ = 145921336704. Its totient is φ = 18394992000.

The previous prime is 61218629761. The next prime is 61218629809. The reversal of 61218629802 is 20892681216.

61218629802 is a `hidden beast` number, since 6 + 1 + 2 + 18 + 629 + 8 + 0 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (61218629809) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 12362427 + ... + 12367377.

It is an arithmetic number, because the mean of its divisors is an integer number (1520013924).

Almost surely, 2^61218629802 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61218629802, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (72960668352).

61218629802 is an abundant number, since it is smaller than the sum of its proper divisors (84702706902).

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

61218629802 is a wasteful number, since it uses less digits than its factorization.

61218629802 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5484 (or 5481 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 45.

The spelling of 61218629802 in words is "sixty-one billion, two hundred eighteen million, six hundred twenty-nine thousand, eight hundred two".