61221516053495 has 32 divisors (see below), whose sum is σ = 84076852586496. Its totient is φ = 41922515520000.

The previous prime is 61221516053429. The next prime is 61221516053497. The reversal of 61221516053495 is 59435061512216.

It is not a de Polignac number, because 61221516053495 - 2¹⁴ = 61221516037111 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61221516053497) 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, 700214972 + ... + 700302398.

It is an arithmetic number, because the mean of its divisors is an integer number (2627401643328).

Almost surely, 2^{61221516053495} is an apocalyptic number.

61221516053495 is a deficient number, since it is larger than the sum of its proper divisors (22855336533001).

61221516053495 is a wasteful number, since it uses less digits than its factorization.

61221516053495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114831.

The product of its (nonzero) digits is 1944000, while the sum is 50.

The spelling of 61221516053495 in words is "sixty-one trillion, two hundred twenty-one billion, five hundred sixteen million, fifty-three thousand, four hundred ninety-five".