61222835856 has 160 divisors (see below), whose sum is σ = 197957329920. Its totient is φ = 15872942592.

The previous prime is 61222835831. The next prime is 61222835881. The reversal of 61222835856 is 65853822216.

It is an interprime number because it is at equal distance from previous prime (61222835831) and next prime (61222835881).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138931 + ... + 376493.

It is an arithmetic number, because the mean of its divisors is an integer number (1237233312).

Almost surely, 2^61222835856 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61222835856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98978664960).

61222835856 is an abundant number, since it is smaller than the sum of its proper divisors (136734494064).

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

61222835856 is a wasteful number, since it uses less digits than its factorization.

61222835856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 237653 (or 237647 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 48.

The spelling of 61222835856 in words is "sixty-one billion, two hundred twenty-two million, eight hundred thirty-five thousand, eight hundred fifty-six".