61535497777152 has 156 divisors (see below), whose sum is σ = 190862326157256. Its totient is φ = 17581570621440.

The previous prime is 61535497777151. The next prime is 61535497777207. The reversal of 61535497777152 is 25177779453516.

It is a super-2 number, since 2×61535497777152² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61535497777151) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 50497599 + ... + 51701822.

It is an arithmetic number, because the mean of its divisors is an integer number (1223476449726).

Almost surely, 2^{61535497777152} is an apocalyptic number.

It is an amenable number.

61535497777152 is an abundant number, since it is smaller than the sum of its proper divisors (129326828380104).

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

61535497777152 is a wasteful number, since it uses less digits than its factorization.

61535497777152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102199462 (or 102199433 counting only the distinct ones).

The product of its digits is 388962000, while the sum is 69.

The spelling of 61535497777152 in words is "sixty-one trillion, five hundred thirty-five billion, four hundred ninety-seven million, seven hundred seventy-seven thousand, one hundred fifty-two".