61131650242 has 16 divisors (see below), whose sum is σ = 104560017912. Its totient is φ = 26554924800.

The previous prime is 61131650233. The next prime is 61131650287. The reversal of 61131650242 is 24205613116.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 60664182601 + 467467641 = 246301^2 + 21621^2 .

It is a super-2 number, since 2×61131650242² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 69153009 + ... + 69153892.

Almost surely, 2^61131650242 is an apocalyptic number.

61131650242 is a deficient number, since it is larger than the sum of its proper divisors (43428367670).

61131650242 is a wasteful number, since it uses less digits than its factorization.

61131650242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138306933.

The product of its (nonzero) digits is 8640, while the sum is 31.

The spelling of 61131650242 in words is "sixty-one billion, one hundred thirty-one million, six hundred fifty thousand, two hundred forty-two".