61350139051 has 4 divisors (see below), whose sum is σ = 61358142312. Its totient is φ = 61342135792.

The previous prime is 61350139049. The next prime is 61350139061. The reversal of 61350139051 is 15093105316.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 61350139051 - 2¹ = 61350139049 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61350138998 and 61350139016.

It is not an unprimeable number, because it can be changed into a prime (61350139021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3990121 + ... + 4005466.

It is an arithmetic number, because the mean of its divisors is an integer number (15339535578).

Almost surely, 2^61350139051 is an apocalyptic number.

61350139051 is a deficient number, since it is larger than the sum of its proper divisors (8003261).

61350139051 is an equidigital number, since it uses as much as digits as its factorization.

61350139051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8003260.

The product of its (nonzero) digits is 12150, while the sum is 34.

The spelling of 61350139051 in words is "sixty-one billion, three hundred fifty million, one hundred thirty-nine thousand, fifty-one".