61213407400 has 24 divisors (see below), whose sum is σ = 142321172670. Its totient is φ = 24485362880.

The previous prime is 61213407391. The next prime is 61213407443. The reversal of 61213407400 is 470431216.

It can be written as a sum of positive squares in 3 ways, for example, as 51528092004 + 9685315396 = 226998^2 + 98414^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 153033319 + ... + 153033718.

Almost surely, 2^61213407400 is an apocalyptic number.

It is an amenable number.

61213407400 is an abundant number, since it is smaller than the sum of its proper divisors (81107765270).

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

61213407400 is a wasteful number, since it uses less digits than its factorization.

61213407400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306067053 (or 306067044 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

Adding to 61213407400 its reverse (470431216), we get a palindrome (61683838616).

The spelling of 61213407400 in words is "sixty-one billion, two hundred thirteen million, four hundred seven thousand, four hundred".