61375925065 has 16 divisors (see below), whose sum is σ = 90647520768. Its totient is φ = 38848936896.

The previous prime is 61375925059. The next prime is 61375925099. The reversal of 61375925065 is 56052957316.

It is a happy number.

It is not a de Polignac number, because 61375925065 - 2³ = 61375925057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67445617 + ... + 67446526.

It is an arithmetic number, because the mean of its divisors is an integer number (5665470048).

Almost surely, 2^61375925065 is an apocalyptic number.

61375925065 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

61375925065 is a deficient number, since it is larger than the sum of its proper divisors (29271595703).

61375925065 is a wasteful number, since it uses less digits than its factorization.

61375925065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134892168.

The product of its (nonzero) digits is 1701000, while the sum is 49.

The spelling of 61375925065 in words is "sixty-one billion, three hundred seventy-five million, nine hundred twenty-five thousand, sixty-five".