61272000020 has 72 divisors (see below), whose sum is σ = 163285930080. Its totient is φ = 19097762880.

The previous prime is 61272000007. The next prime is 61272000029. The reversal of 61272000020 is 2000027216.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 61271999956 and 61272000001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61272000029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2831150 + ... + 2852709.

It is an arithmetic number, because the mean of its divisors is an integer number (2267860140).

Almost surely, 2^61272000020 is an apocalyptic number.

It is an amenable number.

61272000020 is an abundant number, since it is smaller than the sum of its proper divisors (102013930060).

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

61272000020 is a wasteful number, since it uses less digits than its factorization.

61272000020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683893 (or 5683884 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

Adding to 61272000020 its reverse (2000027216), we get a palindrome (63272027236).

The spelling of 61272000020 in words is "sixty-one billion, two hundred seventy-two million, twenty", and thus it is an aban number.