61202761557 has 8 divisors (see below), whose sum is σ = 93261350976. Its totient is φ = 34973006592.

The previous prime is 61202761549. The next prime is 61202761583. The reversal of 61202761557 is 75516720216.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 61202761557 - 2³ = 61202761549 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61202761507) 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, 1457208588 + ... + 1457208629.

It is an arithmetic number, because the mean of its divisors is an integer number (11657668872).

Almost surely, 2^61202761557 is an apocalyptic number.

It is an amenable number.

61202761557 is a deficient number, since it is larger than the sum of its proper divisors (32058589419).

61202761557 is a wasteful number, since it uses less digits than its factorization.

61202761557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2914417227.

The product of its (nonzero) digits is 176400, while the sum is 42.

The spelling of 61202761557 in words is "sixty-one billion, two hundred two million, seven hundred sixty-one thousand, five hundred fifty-seven".