61025131642 has 32 divisors (see below), whose sum is σ = 97651299600. Its totient is φ = 28502123520.

The previous prime is 61025131621. The next prime is 61025131649. The reversal of 61025131642 is 24613152016.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 53670525561 + 7354606081 = 231669^2 + 85759^2 .

It is not an unprimeable number, because it can be changed into a prime (61025131649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5016984 + ... + 5029132.

Almost surely, 2^61025131642 is an apocalyptic number.

61025131642 is a deficient number, since it is larger than the sum of its proper divisors (36626167958).

61025131642 is a wasteful number, since it uses less digits than its factorization.

61025131642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13266.

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

Adding to 61025131642 its reverse (24613152016), we get a palindrome (85638283658).

The spelling of 61025131642 in words is "sixty-one billion, twenty-five million, one hundred thirty-one thousand, six hundred forty-two".