61220558757706 has 8 divisors (see below), whose sum is σ = 92242635617664. Its totient is φ = 30473013551820.

The previous prime is 61220558757637. The next prime is 61220558757739. The reversal of 61220558757706 is 60775785502216.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-4 number, since 4×61220558757706⁴ (a number of 56 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68632912960 + ... + 68632913851.

It is an arithmetic number, because the mean of its divisors is an integer number (11530329452208).

Almost surely, 2^{61220558757706} is an apocalyptic number.

61220558757706 is a deficient number, since it is larger than the sum of its proper divisors (31022076859958).

61220558757706 is a wasteful number, since it uses less digits than its factorization.

61220558757706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137265827036.

The product of its (nonzero) digits is 49392000, while the sum is 61.

The spelling of 61220558757706 in words is "sixty-one trillion, two hundred twenty billion, five hundred fifty-eight million, seven hundred fifty-seven thousand, seven hundred six".