61501580402 has 4 divisors (see below), whose sum is σ = 92252370606. Its totient is φ = 30750790200.

The previous prime is 61501580359. The next prime is 61501580417. The reversal of 61501580402 is 20408510516.

61501580402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 61399388521 + 102191881 = 247789^2 + 10109^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15375395099 + ... + 15375395102.

Almost surely, 2^61501580402 is an apocalyptic number.

61501580402 is a deficient number, since it is larger than the sum of its proper divisors (30750790204).

61501580402 is a wasteful number, since it uses less digits than its factorization.

61501580402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30750790203.

The product of its (nonzero) digits is 9600, while the sum is 32.

The spelling of 61501580402 in words is "sixty-one billion, five hundred one million, five hundred eighty thousand, four hundred two".