61538001707 has 32 divisors (see below), whose sum is σ = 76519618560. Its totient is φ = 48188649600.

The previous prime is 61538001691. The next prime is 61538001731. The reversal of 61538001707 is 70710083516.

It is not a de Polignac number, because 61538001707 - 2⁴ = 61538001691 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61538001757) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10421918 + ... + 10427820.

It is an arithmetic number, because the mean of its divisors is an integer number (2391238080).

Almost surely, 2^61538001707 is an apocalyptic number.

61538001707 is a deficient number, since it is larger than the sum of its proper divisors (14981616853).

61538001707 is a wasteful number, since it uses less digits than its factorization.

61538001707 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7083.

The product of its (nonzero) digits is 35280, while the sum is 38.

The spelling of 61538001707 in words is "sixty-one billion, five hundred thirty-eight million, one thousand, seven hundred seven".