61404222460 has 144 divisors (see below), whose sum is σ = 152020024128. Its totient is φ = 20408371200.

The previous prime is 61404222457. The next prime is 61404222461. The reversal of 61404222460 is 6422240416.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61404222461) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 80688480 + ... + 80689240.

It is an arithmetic number, because the mean of its divisors is an integer number (1055694612).

Almost surely, 2^61404222460 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 61404222460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76010012064).

61404222460 is an abundant number, since it is smaller than the sum of its proper divisors (90615801668).

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

61404222460 is a wasteful number, since it uses less digits than its factorization.

61404222460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1272 (or 1233 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 31.

Adding to 61404222460 its reverse (6422240416), we get a palindrome (67826462876).

The spelling of 61404222460 in words is "sixty-one billion, four hundred four million, two hundred twenty-two thousand, four hundred sixty".