61580321292 has 24 divisors (see below), whose sum is σ = 164214190336. Its totient is φ = 17594377488.

The previous prime is 61580321249. The next prime is 61580321293. The reversal of 61580321292 is 29212308516.

It is a self number, because there is not a number n which added to its sum of digits gives 61580321292.

It is not an unprimeable number, because it can be changed into a prime (61580321293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366549448 + ... + 366549615.

Almost surely, 2^61580321292 is an apocalyptic number.

It is an amenable number.

61580321292 is an abundant number, since it is smaller than the sum of its proper divisors (102633869044).

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

61580321292 is a wasteful number, since it uses less digits than its factorization.

61580321292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733099077 (or 733099075 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 39.

The spelling of 61580321292 in words is "sixty-one billion, five hundred eighty million, three hundred twenty-one thousand, two hundred ninety-two".