61256143137 has 8 divisors (see below), whose sum is σ = 93342694336. Its totient is φ = 35003510352.

The previous prime is 61256143093. The next prime is 61256143141. The reversal of 61256143137 is 73134165216.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61256143137 - 2⁶ = 61256143073 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 61256143095 and 61256143104.

It is not an unprimeable number, because it can be changed into a prime (61256143187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1458479578 + ... + 1458479619.

It is an arithmetic number, because the mean of its divisors is an integer number (11667836792).

Almost surely, 2^61256143137 is an apocalyptic number.

It is an amenable number.

61256143137 is a deficient number, since it is larger than the sum of its proper divisors (32086551199).

61256143137 is a wasteful number, since it uses less digits than its factorization.

61256143137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2916959207.

The product of its digits is 90720, while the sum is 39.

The spelling of 61256143137 in words is "sixty-one billion, two hundred fifty-six million, one hundred forty-three thousand, one hundred thirty-seven".