61501872487 has 16 divisors (see below), whose sum is σ = 67408683264. Its totient is φ = 55648224000.

The previous prime is 61501872473. The next prime is 61501872569. The reversal of 61501872487 is 78427810516.

61501872487 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 61501872487 - 2⁷ = 61501872359 is a prime.

It is a super-3 number, since 3×61501872487³ (a number of 33 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61501872487.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61501872427) 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, 2350903 + ... + 2376919.

It is an arithmetic number, because the mean of its divisors is an integer number (4213042704).

Almost surely, 2^61501872487 is an apocalyptic number.

61501872487 is a deficient number, since it is larger than the sum of its proper divisors (5906810777).

61501872487 is a wasteful number, since it uses less digits than its factorization.

61501872487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27030.

The product of its (nonzero) digits is 752640, while the sum is 49.

The spelling of 61501872487 in words is "sixty-one billion, five hundred one million, eight hundred seventy-two thousand, four hundred eighty-seven".