61699537434 has 32 divisors (see below), whose sum is σ = 123770363904. Its totient is φ = 20504675120.

The previous prime is 61699537433. The next prime is 61699537441. The reversal of 61699537434 is 43473599616.

61699537434 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (61699537433) 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, 9397837 + ... + 9404399.

It is an arithmetic number, because the mean of its divisors is an integer number (3867823872).

Almost surely, 2^61699537434 is an apocalyptic number.

61699537434 is an abundant number, since it is smaller than the sum of its proper divisors (62070826470).

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

61699537434 is a wasteful number, since it uses less digits than its factorization.

61699537434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11042.

The product of its digits is 14696640, while the sum is 57.

The spelling of 61699537434 in words is "sixty-one billion, six hundred ninety-nine million, five hundred thirty-seven thousand, four hundred thirty-four".