61672836145 has 8 divisors (see below), whose sum is σ = 75049761600. Its totient is φ = 48643363440.

The previous prime is 61672836103. The next prime is 61672836149. The reversal of 61672836145 is 54163827616.

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

It is not a de Polignac number, because 61672836145 - 2¹⁵ = 61672803377 is a prime.

It is a super-2 number, since 2×61672836145² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61672836149) 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, 86862795 + ... + 86863504.

It is an arithmetic number, because the mean of its divisors is an integer number (9381220200).

Almost surely, 2^61672836145 is an apocalyptic number.

It is an amenable number.

61672836145 is a deficient number, since it is larger than the sum of its proper divisors (13376925455).

61672836145 is a wasteful number, since it uses less digits than its factorization.

61672836145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173726375.

The product of its digits is 1451520, while the sum is 49.

The spelling of 61672836145 in words is "sixty-one billion, six hundred seventy-two million, eight hundred thirty-six thousand, one hundred forty-five".