122547745620 has 36 divisors (see below), whose sum is σ = 371728162260. Its totient is φ = 32679398784.

The previous prime is 122547745613. The next prime is 122547745627. The reversal of 122547745620 is 26547745221.

122547745620 is a `hidden beast` number, since 1 + 2 + 2 + 547 + 7 + 45 + 62 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (122547745613) and next prime (122547745627).

It can be written as a sum of positive squares in 2 ways, for example, as 13275187524 + 109272558096 = 115218^2 + 330564^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122547745627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340410225 + ... + 340410584.

It is an arithmetic number, because the mean of its divisors is an integer number (10325782285).

Almost surely, 2^122547745620 is an apocalyptic number.

122547745620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

122547745620 is an abundant number, since it is smaller than the sum of its proper divisors (249180416640).

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

122547745620 is a wasteful number, since it uses less digits than its factorization.

122547745620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680820824 (or 680820819 counting only the distinct ones).

The product of its (nonzero) digits is 940800, while the sum is 45.

The spelling of 122547745620 in words is "one hundred twenty-two billion, five hundred forty-seven million, seven hundred forty-five thousand, six hundred twenty".