61908226961724 has 864 divisors, whose sum is σ = 197426137708800. Its totient is φ = 16184802816000.

The previous prime is 61908226961689. The next prime is 61908226961747. The reversal of 61908226961724 is 42716962280916.

61908226961724 is a `hidden beast` number, since 6 + 1 + 9 + 0 + 8 + 2 + 2 + 6 + 9 + 617 + 2 + 4 = 666.

It is a super-2 number, since 2×61908226961724² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 10424012347 + ... + 10424018285.

It is an arithmetic number, because the mean of its divisors is an integer number (228502474200).

Almost surely, 2^{61908226961724} 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 61908226961724, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (98713068854400).

61908226961724 is an abundant number, since it is smaller than the sum of its proper divisors (135517910747076).

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

61908226961724 is a wasteful number, since it uses less digits than its factorization.

61908226961724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6187 (or 6169 counting only the distinct ones).

The product of its (nonzero) digits is 31352832, while the sum is 63.

The spelling of 61908226961724 in words is "sixty-one trillion, nine hundred eight billion, two hundred twenty-six million, nine hundred sixty-one thousand, seven hundred twenty-four".