61250501205155 has 16 divisors (see below), whose sum is σ = 79168334488320. Its totient is φ = 45341864291808.

The previous prime is 61250501205121. The next prime is 61250501205161. The reversal of 61250501205155 is 55150210505216.

It is a cyclic number.

It is not a de Polignac number, because 61250501205155 - 2²⁰ = 61250500156579 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, 7496997287 + ... + 7497005456.

It is an arithmetic number, because the mean of its divisors is an integer number (4948020905520).

Almost surely, 2^{61250501205155} is an apocalyptic number.

61250501205155 is a deficient number, since it is larger than the sum of its proper divisors (17917833283165).

61250501205155 is a wasteful number, since it uses less digits than its factorization.

61250501205155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14994002810.

The product of its (nonzero) digits is 75000, while the sum is 38.

The spelling of 61250501205155 in words is "sixty-one trillion, two hundred fifty billion, five hundred one million, two hundred five thousand, one hundred fifty-five".