61131452610 has 64 divisors (see below), whose sum is σ = 148342803840. Its totient is φ = 16121763840.

The previous prime is 61131452563. The next prime is 61131452659. The reversal of 61131452610 is 1625413116.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1124946 + ... + 1178034.

It is an arithmetic number, because the mean of its divisors is an integer number (2317856310).

Almost surely, 2^61131452610 is an apocalyptic number.

61131452610 is an abundant number, since it is smaller than the sum of its proper divisors (87211351230).

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

61131452610 is a wasteful number, since it uses less digits than its factorization.

61131452610 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53523.

The product of its (nonzero) digits is 4320, while the sum is 30.

Adding to 61131452610 its reverse (1625413116), we get a palindrome (62756865726).

The spelling of 61131452610 in words is "sixty-one billion, one hundred thirty-one million, four hundred fifty-two thousand, six hundred ten".