61542851415 has 16 divisors (see below), whose sum is σ = 98502389088. Its totient is φ = 32811578496.

The previous prime is 61542851411. The next prime is 61542851423. The reversal of 61542851415 is 51415824516.

It is not a de Polignac number, because 61542851415 - 2² = 61542851411 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61542851411) 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, 659512 + ... + 747021.

It is an arithmetic number, because the mean of its divisors is an integer number (6156399318).

Almost surely, 2^61542851415 is an apocalyptic number.

61542851415 is a deficient number, since it is larger than the sum of its proper divisors (36959537673).

61542851415 is a wasteful number, since it uses less digits than its factorization.

61542851415 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1409458.

The product of its digits is 192000, while the sum is 42.

The spelling of 61542851415 in words is "sixty-one billion, five hundred forty-two million, eight hundred fifty-one thousand, four hundred fifteen".