61215402887052 has 12 divisors (see below), whose sum is σ = 142835940069816. Its totient is φ = 20405134295680.

The previous prime is 61215402887033. The next prime is 61215402887053. The reversal of 61215402887052 is 25078820451216.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 61215402886986 and 61215402887004.

It is not an unprimeable number, because it can be changed into a prime (61215402887053) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2550641786949 + ... + 2550641786972.

It is an arithmetic number, because the mean of its divisors is an integer number (11902995005818).

Almost surely, 2^{61215402887052} is an apocalyptic number.

It is an amenable number.

61215402887052 is an abundant number, since it is smaller than the sum of its proper divisors (81620537182764).

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

61215402887052 is a wasteful number, since it uses less digits than its factorization.

61215402887052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5101283573928 (or 5101283573926 counting only the distinct ones).

The product of its (nonzero) digits is 2150400, while the sum is 51.

The spelling of 61215402887052 in words is "sixty-one trillion, two hundred fifteen billion, four hundred two million, eight hundred eighty-seven thousand, fifty-two".