61015280135898 has 64 divisors (see below), whose sum is σ = 134062096896000. Its totient is φ = 18359304202560.

The previous prime is 61015280135879. The next prime is 61015280135899. The reversal of 61015280135898 is 89853108251016.

It is a super-2 number, since 2×61015280135898² (a number of 28 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61015280135899) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28701963 + ... + 30754401.

It is an arithmetic number, because the mean of its divisors is an integer number (2094720264000).

Almost surely, 2^{61015280135898} is an apocalyptic number.

61015280135898 is an abundant number, since it is smaller than the sum of its proper divisors (73046816760102).

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

61015280135898 is a wasteful number, since it uses less digits than its factorization.

61015280135898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2055627.

The product of its (nonzero) digits is 4147200, while the sum is 57.

The spelling of 61015280135898 in words is "sixty-one trillion, fifteen billion, two hundred eighty million, one hundred thirty-five thousand, eight hundred ninety-eight".