61971294316 has 6 divisors (see below), whose sum is σ = 108449765060. Its totient is φ = 30985647156.

The previous prime is 61971294299. The next prime is 61971294317. The reversal of 61971294316 is 61349217916.

It is a self number, because there is not a number n which added to its sum of digits gives 61971294316.

It is not an unprimeable number, because it can be changed into a prime (61971294317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7746411786 + ... + 7746411793.

Almost surely, 2^61971294316 is an apocalyptic number.

It is an amenable number.

61971294316 is a deficient number, since it is larger than the sum of its proper divisors (46478470744).

61971294316 is a wasteful number, since it uses less digits than its factorization.

61971294316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15492823583 (or 15492823581 counting only the distinct ones).

The product of its digits is 489888, while the sum is 49.

The spelling of 61971294316 in words is "sixty-one billion, nine hundred seventy-one million, two hundred ninety-four thousand, three hundred sixteen".