61515232555150 has 48 divisors (see below), whose sum is σ = 124889771967120. Its totient is φ = 22356671385600.

The previous prime is 61515232555103. The next prime is 61515232555157. The reversal of 61515232555150 is 5155523251516.

It is a self number, because there is not a number n which added to its sum of digits gives 61515232555150.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61515232555157) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30275379 + ... + 32243278.

It is an arithmetic number, because the mean of its divisors is an integer number (2601870249315).

Almost surely, 2^{61515232555150} is an apocalyptic number.

61515232555150 is an abundant number, since it is smaller than the sum of its proper divisors (63374539411970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61515232555150 is a wasteful number, since it uses less digits than its factorization.

61515232555150 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62520469 (or 62520464 counting only the distinct ones).

The product of its (nonzero) digits is 1125000, while the sum is 46.

The spelling of 61515232555150 in words is "sixty-one trillion, five hundred fifteen billion, two hundred thirty-two million, five hundred fifty-five thousand, one hundred fifty".