61201515072 has 28 divisors (see below), whose sum is σ = 161929009136. Its totient is φ = 20400504960.

The previous prime is 61201515071. The next prime is 61201515127. The reversal of 61201515072 is 27051510216.

It is not an unprimeable number, because it can be changed into a prime (61201515071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 159378754 + ... + 159379137.

Almost surely, 2^61201515072 is an apocalyptic number.

It is an amenable number.

61201515072 is an abundant number, since it is smaller than the sum of its proper divisors (100727494064).

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

61201515072 is a wasteful number, since it uses less digits than its factorization.

61201515072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318757906 (or 318757896 counting only the distinct ones).

The product of its (nonzero) digits is 4200, while the sum is 30.

The spelling of 61201515072 in words is "sixty-one billion, two hundred one million, five hundred fifteen thousand, seventy-two".