61520532312765 has 8 divisors (see below), whose sum is σ = 98432851700448. Its totient is φ = 32810950566800.

The previous prime is 61520532312737. The next prime is 61520532312791. The reversal of 61520532312765 is 56721323502516.

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

It is not a de Polignac number, because 61520532312765 - 2⁸ = 61520532312509 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2050684410411 + ... + 2050684410440.

It is an arithmetic number, because the mean of its divisors is an integer number (12304106462556).

Almost surely, 2^{61520532312765} is an apocalyptic number.

It is an amenable number.

61520532312765 is a deficient number, since it is larger than the sum of its proper divisors (36912319387683).

61520532312765 is a wasteful number, since it uses less digits than its factorization.

61520532312765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4101368820859.

The product of its (nonzero) digits is 2268000, while the sum is 48.

The spelling of 61520532312765 in words is "sixty-one trillion, five hundred twenty billion, five hundred thirty-two million, three hundred twelve thousand, seven hundred sixty-five".