61670181020 has 48 divisors (see below), whose sum is σ = 148108336320. Its totient is φ = 21129790464.

The previous prime is 61670180989. The next prime is 61670181103. The reversal of 61670181020 is 2018107616.

It is a happy number.

61670181020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×61670181020² (a number of 22 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 15 ways as a sum of consecutive naturals, for example, 60542 + ... + 356378.

It is an arithmetic number, because the mean of its divisors is an integer number (3085590340).

Almost surely, 2^61670181020 is an apocalyptic number.

It is an amenable number.

61670181020 is an abundant number, since it is smaller than the sum of its proper divisors (86438155300).

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

61670181020 is a wasteful number, since it uses less digits than its factorization.

61670181020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 297342 (or 297340 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

Adding to 61670181020 its reverse (2018107616), we get a palindrome (63688288636).

The spelling of 61670181020 in words is "sixty-one billion, six hundred seventy million, one hundred eighty-one thousand, twenty".