61606501020 has 48 divisors (see below), whose sum is σ = 191664671520. Its totient is φ = 16428400128.

The previous prime is 61606501009. The next prime is 61606501043. The reversal of 61606501020 is 2010560616.

It is a happy number.

61606501020 is a `hidden beast` number, since 6 + 1 + 6 + 0 + 650 + 1 + 0 + 2 + 0 = 666.

It is a super-2 number, since 2×61606501020² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57042517 + ... + 57043596.

It is an arithmetic number, because the mean of its divisors is an integer number (3993013990).

Almost surely, 2^61606501020 is an apocalyptic number.

61606501020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61606501020 is an abundant number, since it is smaller than the sum of its proper divisors (130058170500).

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

61606501020 is a wasteful number, since it uses less digits than its factorization.

61606501020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114086131 (or 114086123 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

The spelling of 61606501020 in words is "sixty-one billion, six hundred six million, five hundred one thousand, twenty".