61639750134 has 48 divisors (see below), whose sum is σ = 134449988400. Its totient is φ = 20408813568.

The previous prime is 61639750121. The next prime is 61639750153. The reversal of 61639750134 is 43105793616.

It is a happy number.

61639750134 is a `hidden beast` number, since 6 + 1 + 639 + 7 + 5 + 0 + 1 + 3 + 4 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 61639750134.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2982942 + ... + 3003534.

It is an arithmetic number, because the mean of its divisors is an integer number (2801041425).

Almost surely, 2^61639750134 is an apocalyptic number.

61639750134 is an abundant number, since it is smaller than the sum of its proper divisors (72810238266).

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

61639750134 is a wasteful number, since it uses less digits than its factorization.

61639750134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21709 (or 21706 counting only the distinct ones).

The product of its (nonzero) digits is 408240, while the sum is 45.

The spelling of 61639750134 in words is "sixty-one billion, six hundred thirty-nine million, seven hundred fifty thousand, one hundred thirty-four".