61215259226444 has 18 divisors (see below), whose sum is σ = 109803278050452. Its totient is φ = 29861102058400.

The previous prime is 61215259226441. The next prime is 61215259226483. The reversal of 61215259226444 is 44462295251216.

It is a super-3 number, since 3×61215259226444³ (a number of 42 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (61215259226441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4551990542 + ... + 4552003989.

It is an arithmetic number, because the mean of its divisors is an integer number (6100182113914).

Almost surely, 2^{61215259226444} is an apocalyptic number.

It is an amenable number.

61215259226444 is a deficient number, since it is larger than the sum of its proper divisors (48588018824008).

61215259226444 is a wasteful number, since it uses less digits than its factorization.

61215259226444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9103994617 (or 9103994574 counting only the distinct ones).

The product of its digits is 8294400, while the sum is 53.

The spelling of 61215259226444 in words is "sixty-one trillion, two hundred fifteen billion, two hundred fifty-nine million, two hundred twenty-six thousand, four hundred forty-four".