61155216471 has 16 divisors (see below), whose sum is σ = 82538184960. Its totient is φ = 40271380800.

The previous prime is 61155216461. The next prime is 61155216481. The reversal of 61155216471 is 17461255116.

61155216471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (61155216461) and next prime (61155216481).

It is not a de Polignac number, because 61155216471 - 2¹⁵ = 61155183703 is a prime.

It is a super-3 number, since 3×61155216471³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61155216401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1511635 + ... + 1551563.

It is an arithmetic number, because the mean of its divisors is an integer number (5158636560).

Almost surely, 2^61155216471 is an apocalyptic number.

61155216471 is a deficient number, since it is larger than the sum of its proper divisors (21382968489).

61155216471 is a wasteful number, since it uses less digits than its factorization.

61155216471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46166.

The product of its digits is 50400, while the sum is 39.

The spelling of 61155216471 in words is "sixty-one billion, one hundred fifty-five million, two hundred sixteen thousand, four hundred seventy-one".